Great stuff. I have built a 3s house battery with 600 x 18650 cells for my small motorhome , and also a cranking battery using 8 x headway cells, backing up super-capacitors . The cranking battery weighs 7kg and is now almost 2 years in service. Cranks a 5 cylinder engine much better than the old style lead-acid. The house battery, 12v, powers an induction stove through 4000/8000w inverter. Now 12 months old and doing very well for fridge and lights too. Here's what might help with battery builds... cork floor tiles make excellent insulation and shock absorbing layers. Cork chars but doesn't burn! Also, silicone sheets (place mats from ebay) also doesn't burn, is fairly thin, and acts as a good separation between cells if needed. Cheers from Oz, JohnT
Thanks, man. Great video! The problem is we can now purchase brand new commercial 1C 12V LiFePO4 batteries, including BMS and warranty at 40AH for $400 and 100AH for $730. This DIY solution is great for a hobbyist but not very cost effective. Thanks again!
@Lola Uro The $500 40AH battery in the video is equivalent to the $400 40AH commercial unit. For $700, you get 150% additional capacity for 57% additional cost.
Wow is all I can say. I’m researching building an RV out of a shuttle bus for me to live in and to use daily to help the homeless. I’m currently homeless and working on selling everything I own to buy and build the RV. I’ve already been making the contacts to be of service to my community. This is what I can see as a great solution to my power source needs. All I can say is it is because of people like you that I can see my dream come true.
Thanks Jehu. I too have been waiting for an episode like this. I have been wanting to build a starter batter for my cars and this is it! I appreciate the fact that you are doing the R&D for me because I just can't find the time. This will allow me to focus on other projects that use this technology. Well worth my Patreon membership!
This is a great job. I bought a replacement battery with LiFePO4 for my 260 bike after going throughout a couple of lead acid that left me stranded. Never again. Plenty of power and way ligther. I won´t go back ever to lead acid. And with your video, I will make my own now for my cottage in Venezuela. Thanks dude!.
5:15 Look up "fish paper" for use in telecom DC power plants. It's cheap, thin and very effective as an insulator. Really enjoy the build video, thanks for sharing.
Been a viewer from the start, never commented. I enjoy watching someone as interested in these batteries as I am. Have built many lithium projects and driven five of my conversions. I am a geek. Cannot help it!
@@Sr_iRL it depends on energy density you want and cost and how much labor you want to do. Now if going to use the 18650 chemistry it would be more energy dense to use the 21700 cells and if you dont need to cool prismatic or pouch cells may be better. You have to define what your goals for cost labor size energy density whether or not cooling will be needed amp draw etc among other things like the shape of the space they need to fit in etc first.
Used LiFePO4 cells are definitely worth it as long as they are balanced and not too worn out. And the peace of mind charging with off the shelf 12V chargers is priceless.
@@GBOAC personally I find it more useful to top balance especially if its just four rows in series. if you search "usb lifepo4 3.6v" on ebay, they will have individual charge circuits you can place on each row of cells for a nice and slow top balance charge.
Thank you very much my friend for your videos. Thanks to you the wait is finally over for my own 38120s. Ordered 8 to make two 12 volt batteries for powering accessories on the electric bikes. I LOVE 12 volts. Just last week ran 12 volt into the house from the solar panel and battery bank. Installed an RV 12volt vent fan to be used as a whole house fan, venting the house and attic. Works great! Also have more than one car stereos running, like the one in the bathroom for a great sounding shower!
About time someone started a DIY Recycle!! I love it!!! Sadly the Buck talks the loudest today, if I had my way, I would have NiFe Cells driving all vehicles, why, because it is "Non-destructive" chemistry, Mr Edison's car is still able to run on his cells, the only replacement is the electrolyte every 30 odd years,, AND that is Potassium Hydroxide -- really good for the garden!!!!! Thank you Jehugarcia!!
After one year this build has entered the territory of purely educational. A 100Ah Battleborn would actually be cheaper than two of these even if you could still source the cells at the stated price. These cells are $88 new. Still a great build.
Finally! A thorough video compare to other videos on the web regarding the headway cells. Thermal vid and explanation definitely helps boost confidence when building a high amperage battery pack. Look forward to build a couple. Thanks Jehu!
Thanks for the Video clip! Excuse me for butting in, I am interested in your opinion. Have you ever tried - Rozardner Powerful Battery Reality (erm, check it on google should be there)? It is a smashing one of a kind product for learning how to recondition an old battery minus the hard work. Ive heard some extraordinary things about it and my mate after many years got great results with it.
These headway batteries are nice. I build a replacement battery for my lawn mower (36v lead acid). I am able to use the standard charger that came with it. I shorted the batteries a couple time during my build and ruined a few batteries. You definitely need to be careful not to short them.
Very nice video! Great job on that build! My one and only "issue" however is using 'combustable' cardboard as spacing material. It could also attract & hold moisture. As I said however in your 300k video, I'd love to have that for my ham radio gear! Wow! That thing would probably power my 100W radio for nearly a week without recharging. (Avg. radio power usage much less than 100W...) great for emergency communication; like during earthquakes, fires, etc. Remember, when all else fails (including cell towers!) - ham radio is there! (During the Paradise fire last year; amateur radio operators were attached to the various command units & fire/emt/equipment trucks to provide communications after all of the local cell towers & CalFire comm. towers failed/burned!)
Swine radio stations haha! Dude why the hell would you listen to pigs during an earthquake? I think ur high af this video is about batteries not imaginary radio stations ran by pigs, TAKE UR MEDS
Liked the video. You have been a good teacher. I built my own power box from your inspiring vids but I couldn't afford a 200 AH lithium battery so I had to make it out of 2 AGM which are heavier than hell. LOL.. But I got it done before our last hurricane and but it to work supporting my refrigerators and freezers. Its all good!
I think it can suffer from temperature elevation due to no ventilation in the box. When new no problem but by aging cells may increase their internal resistance and generate more heat. How do you prevent from that?
For my battery back-up for my house still in Grid , what I see the higher the voltage the less power loses 48v looks like is the lowest power lose ! And you’re video on Lithium Titanate batteries was good heads up Anout 50,000 to 100,000 cycles !
This would work great for what I'm doing at my neighbors house house, I'm helping to get her set up with a few solar panels and lights and wind generator. Shes on a fixed income so this looks perfect. Awesome job.
I am a member of a K9 Search and Rescue team who need several smaller amp hour 12v batteries to power our communication equipment. I was thinking of 4s 2p. I wonder if you might give our Search team some pointers on BMS and charging units for a smaller Ah pack. Our team hikes these batteries and comm gear to mountaintops to extend the range of radios, thus the reason for smaller Ah packs. Great channel and can't wait to see what you're up to next. Any help would be massively appreciated. Dave N2KTO
You are such a good TH-camr I totally enjoyed watching your two tubes to explain the difference with a battery but you can start your car versus you're storing energy for something and how they work together and they don't also like to into the contest to get in the giveaway on that battery that you made
It would have been very nice to see some discussion/commentary about the use of these in a vehicle, and how well they match with the function of the alternator etc without modifying the car. There is a lot of information missing here.
I would love to have a 1 on 1 with jehu asking these questions. I really want a couple of these powering my amplifier for sub system in my truck. But I'm unsure of the amperage and watts and charging system if it were tied into my lead acid under the hood
Cardboard is a no-no in electronics, it absorbs humidity (removing its sole purpose here), can be de-integrated by molds, and of course spreads fire if it would even start as smoldering in a corner. He should have used hard plastic plates (just like the material of the box) padded with inflammable, non-static foam on both sides. Imho the sides of the enclosure should have been padded as well to prevent wear from vibrations. Also are the cells just resting on their screws on the bottom??? That would certainly damage the bottom of the box in the long run. Cardboard wouldn't help there, they would sink through it in days. The example is fine for a 12V power source in your lab or stationary set up, but not really suitable for a car or some other vehicle. You also risk liability when a fire would spread from this, as it doesn't quite meet any safety standards.
Yup, I use plastic from cheap dollar store school folders. To make it even better, but non-servicable, is to pour casting resin to hold everything in place inside the battery box since vibration from engine will rattle and even unscrew the joints.
@@1FishinAddict resin for the bottom yes, like maybe 1 or 2 cm high, preferably with an already solidified bottom layer before putting in the batteries. But not the entire box as it isolates heat too, and if one cell would emit gasses which then can't escape, you made yourself a little bomb.
I have a LiFePo4 48v 20Ah battery on my 2016 escooter. It's absolutely amazing. I can go 20mile easily on a charge. It's so impressive, that I contacted the person who invented it to thank him. He was awesome, and he also just won a Nobel Prize for all his work with new battery technology. In fact, John Goodenough is currently working on solid state (aka Glass) batteries. He's like 98 years old now, and plugging away like he's 40!
Great video and like how you broke every dollar down at the end. I bought 4 headway cells from battery hook up for my integra was going to just use copper bus bars into the screws and hook it up. But I heard the alternator will constantly charge them making for a very short life. So maybe I should look into a bms
@@dannyw7662 Hey thank you. Was just a couple weeks ago I seen a video about a r enology dc to dc. I’ll have too see how they charge up now I have a bmax charger. I’m guessing I still will want a bms on them.? I’d love to use them as a aux battery in the trunk. Wanted to completely replace but would need more cells.
@Alex Fiet I suspect that the BMS can take care of the Alternator current for charging. As for the cold cranking amps. Jehu mentioned that one of these in dead short should do 200Amps, and he's got 8 cells in parallel, from a CCA standpoint you'd be seeing something like 1600A less any inefficiencies and any 'used battery wear'.
im a professional racing drone pilot and ive been trying to figure out a way to charge 4s lipos in the field with 18650's i think i may give something like this a try, love the channel bro ive been watching for a few months now!
Good stuff... is there smaller 12V LiFEP04 batteries you can make? like a in a formfactor of a 12V 7A VSLA? that would be quite a practical portable battery... to be used as UPS replacement or alarm backup batteries
4 of these in series will be 12V 8Ah. They will be significantly smaller than a 12V 7Ah VSLA (about half size), and be able to deliver significantly higher power (2000w vs ~400w?). They will be lighter and more reliable. But it will be more expensive. I would not choose these cells for UPS though, as there are other cells suited for UPS which is high energy/low power.
U know you can buy laptop batterys on sale. $20 has like 5 or 6 new batterys in it. So u need 2 or 4 laptop pack. Do you own research. Is called google
@@myes344 I know its been a year or more, but you dont even need to google to know laptop batteries don't use these cells. He says it in the video. Go eat an ant hill.
I do not care about no free battery. You are doing a good job there young man. With Isaac Arthur, Fraser Cain , Elon Musk , Will Prowse and you of course All of you are doing a good job at enlightenment to us not so savvy folks. Thank You
I know this is many months old, yet I still hope you read comments on old videos. AND of course this is a RV Trailer type question, don't run yet. I'm building my own ATV hauler/camper out of a large cargo trailer so maybe that can add to the curiosity to read further. I'm wanting to use LiFePo4 batteries like you have shown here yet up the count to 56 (14x4) to get into that 100Ah range for off grid camping and still being able to enjoy many luxuries while doing so. However I have a nice little 40A rated power panel that is set up for lead acid. Given that this power panel really cannot handle charging LiFePo4 100Ah pack at full speed, I have thought about adding a 300A diode in the output to the trailer power panel to reject incoming power to use a separate 120V charger. I can also easily build a over-volt cutoff as well to disconnect the battery while charging, since when plugged in to mains the power panel is capable of 40A output or less to the trailer electrical at 13.8 - 12.8V. The reason I ask this is during off grid scenarios I may be required to top off my charge with a 4KW nominal generator. Given this information what charger would be suitable and do you think this would be a beneficial modification for RV use? I patiently await any replies from you or other experts. Thank you all for your time. Stu
@@iKingRPG I now have 105 ah of headways, got em for $8 a piece from bathookup and the majority test @ 8ah! Its been a fun build but on to the next. Prismatic are my current addiction though the headways are great for 12v high current use.
Hey brotha . Omg this is so incredibly cool. Amazing power and durability. Ideal for what I need. I will dream of this untill I'm dead. I could never afford to build one but this is perfect for my trailer. Your so awesome for sharing the details. It would take me 10 years to buy each part but a guy can dream. Using two old battery's from a diesel truck that my son donated from his job is what I use and omg they are heavy. But they are 4 years old and were treated poorly. When I got them charged fully they were about 12.9 volts. But just don't have the amps in them. This is so hard to charge fast. Takes hours every day to charge with jumper cables and my vehicle. Ahhh . I'm basically homeless as we lost our home . The wife hates it but I'm grateful we have a trailer even though it's old. I'm on disability and dont get squat from social security. This is. Great info. If you ever had and old stuff to donate I'd be the one to help. Anything at this point. I need to use a Bipap machine at night to sleep and it' uses a lot of power with the water chamber on. Without it it's not so bad 6 amps maybe. But the 300 watt inverter just kills the battery before I wake up. I have to hook up a cord to my truck battery when it dies . (usually after 4 hours ) so I get up and do that to get the rest of my sleep. What a bummer it is. Anyways I just love watching your videos. I'm hooked. I've watched them over and over. But darnit I don't have the money to build one. Arrrgggh. I'm dreaming though. So hey great name and great videos. Keep doing what you do. Old People like me just love this info. Jehu Garcia peace my brotha.
Hi, I've seen your detailed video & I liked it, however I am always battery-overheating-phobic, wouldn't it be better if you make some ventilation halls on top & bottom of the plastic battery body to allow air circulation, or even better add an electronically controlled fan! this should keep the temperature under control & extend the battery life time, nevertheless Good Job, thumbs up.
Due to the current being limited to 200 A by the bms, I'd say this would be unsuitable for use on a car. My puny little car uses a battery with a CCA about double the capacity of the BMS on this. Problem 2 with using it in a car is that the charging system on a car is optimised for lead acid, it will stress a lithium based battery. Problem 3, I would be very vary about putting a battery like this in the engine bay of a car lots of heat and vibration at the very least it would cause the screw connections to work loose in short order. Lithium shines in long deep charge discharge cycles which doesn't happen in ICE cars. A car wants several hundred amps for a few seconds to start it, once started the alternator will have it back fully charged within a minute and then the alternator runs all the electrical stuff itself. A car battery in a car will last for years, using a car battery in a deep charge discharge like for solar storage will fook it in a very few weeks. Horses for courses.
most people who are wanting Lithium for a car, aren't wanting 12v, we are wanting them for our sound systems, which typically also includes a high output alternator. I myself am using a Mechman 370 amp Alternator that at idle is 14.4 volts, so for me, I use Lithium that rests at 14.8 when fully charged.
Ordered 16 38120 HD 8 ah Making a portable power box. I have a 1/2 mile long driveway. I have a harbor freight electric pole saw to keep the brush and branches cut back. I’d like to make four separate 12 volt batteries. Wire in series, then in parallel. Result 24 volt 16 amp system? Right? Will I need a BMS for all 16 batteries, or one for every 12 volt. Then a 24 inverter, but what wattage? Your channel is very informative. You sorta remind me of a friend I knew while I was on active duty in the 90’s
I have so many questions in my head. First of all thank you for the video! 1) Can this really replace a lead acid battery in any car? 2) Could the battery handle heat, temperatures like the lead-acid battery would do? 3) What happens when the alternator's output voltage moves up & down? 4) How can it handle the ups & downs such as when cranking the engine and what not? 5) What are the actual pros & cons of this battery than having a lead-acid battery? I'm in the brink of kicking this project off, I'm just concerned with question marks in my head!
Could it? Probably yes but would this particular one be cost effective, practical and long lasting more than likely not as much as you are probably hoping or thinking. Even if you took extraordinary and more costly measures to give it the best chance for long term success or had the perfect car in the perfect year round climate I would bet against it. This tech has come a long way but in this particular application IMHO it is probably not quite there yet. There are many other uses where lithium out performs old tech in the long term but I do not see that here yet. That said there is always a cost to good education so if you look at it in that light do not hold back on experimenting and learn things "hands on" because that kind of knowledge has extreme value over your lifetime. That said it would be more cost effective to try one of these www.aliexpress.com/item/4000048426769.html?spm=a2g0o.productlist.0.0.51cd5407uVGzvI&algo_pvid=df879e93-fab8-43ef-a896-5a98e58216b7&algo_expid=df879e93-fab8-43ef-a896-5a98e58216b7-13&btsid=caf40ea1-3d65-4923-a231-df22d6e4d7cb&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_52
It's a little small for a car battery, I think he said 35-50ah...that's a lawn mower size battery. A car battery is generally 100+ ah. If you wired 4+ in parallel yes, it would work. That's basically what a Tesla car battery is about 1500 or so 18650 batteries wired in parallel.
@@MichaelCook1981 I planned to make my own lithium battery for my Cressida. But the BMS that can handle 70Amp++ is expensive in my place (70A to crank from cold start, inline-6 2.0L engine)
@@jehugarcia I would think it is getting a lot more common.. now that isn't surplus tesla module type pricing (out of wrecked Teslas) -- is a tad high, but a LOT less prone to having things like fires and the like. A much safer chemistry than the regular Lithium cells, which can do miracles of light and sound if the BMS fails... Looks like the LiFEpo was doing very nicely in your testing.... going with 48v would make the current 1/4 to get the same power out... which means less heating and the like.. Just a bit more $
I think you have great videos and I enjoy the information you obtain and share with all of us for free. I'm sure it takes an incredible amount of your time not only coming up with the ideas but to also film and edit so again I want to say Thanks. Now here's my question "I'm curious why you tend to test so many of your builds at the maximum amp output?" maybe I'm missing something but while I understand lithiums are far superior to lead acid when handling high loading, no battery will survive anywhere near its advertised cycle life when used in such a way. I don't know about everyone else but I try to size my battery to have at least 10 times the amphour capacity of my average amps consumed during my peak demand period. So if my load at peak usage is 25 amps per hour I would want at least a 250 ah battery to supply power for my needs. This in my thinking keeps the battery from the stresses of heavy discharge and the resulting high current charging. Curious also as to why you did not use copper for the buss bars and heavier cable for your internal leads to output posts and then for your inverter connections? Those cables should have not shown any thermal rise beyond a few degrees.
Contemplated using the headway cells on my electric chopper build. Spacing them around the inner diameter of my rear wheel. But I already had a bunch of 18650’s so I used your 1/8th watt resistor idea and built my own pack. Keep at it man. Chopper build seen here th-cam.com/video/IL0hkSwfTFM/w-d-xo.html
That looks like exactly the thing I could use to power my travel trailer. (That and a good inverter!) I could see how a bank of these, some solar panels and a big inverter could run a small house pretty handily. If only I could afford to get into building such a system.
You did a great job on the build and video; however this video demonstrates those headway cells are way to expensive. If you was to use these cells to make a 100AH 12.8v battery it would cost more than the commercialy available Battleborn battery. I have built a few batteries using prismatic cells and 26650's all LiFePO4 and I can build those for far less. For me the whole point of building one is to make one that can handle higher amps and cost less than off the shelf. Having said that he did make an excellent battery pack.
plz make a video on 18650 battery pack cooling solution for electric car, here in Pakistan temperature is hot, if car is parked outside, battery pack will get heatup , what could be best cooling solution for custom made 18650 packs, Air or liquid cooled, both ... anyone every tried ?
Check out Will Prowse's channel. he goes over a lot of basics about working with this battery technology with a lot of great products and real world applications that you'll be able to relate to
Excellent video. Very well done and informative. But I'm about to show how ignorant I am regarding lithium batteries with a question. When the amp hour rating of 12v lead acid batteries is calculated the standard seems to be by using a 20 amp load, and if that load is changed it affects the amp hour calculation because of the Peukert effect. Is this not the case for lithium batteries? I'm just trying to understand why you would use the 2kw rate to calculate amp hours rather than the 20 amp rate. Honest question, I really don't know.
I wouldn't recommend buying these seconds 38120' batteries. Why! I bought 8 units from Battery hookup @ AU$189.23 (8XAU$ 23.65ea) includes DHL transport The batteries are very old, manufactured 2016 or 2017. Nothing in web ad that mentions cell AGE & insulation damage. Have one dud battery that's under spec @ 3.14v Clearly shows overheating or cooked damage history @ + end. Not like the others. The rest are either 3.288v or 3.4v with surface insulation damage. As price comparison, I've since discovered, from China, GEB brand NEW GEB 38120 @ US$12.92PCS + transport for the 38120 battery.
Yep battery hookups is overpriced. The battery he builds in this video would be around the $400 range once you add hardware, box, bms and cells. Definitely not worth the 35AH rating.
I was really contemplating purchasing these cells from Battery hookup until I read your post. Getting duds is what I am afraid because they are used, even though their description says all tested something like 95% and up. I was going to make a 4S10P pack, so 40 cells. Now I don't think I will be ordering any.
That's where I started. They are just OK,so far. I'm very glad that I didn't start with flooded ones!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I would have blown up my shed by now. Those batteries are not good for anything that moves at all. My AGM ones are way safer,but not as good as the ones that are the...best. Lithium or the ...other ones. I'm too tired to look it up,now. LI FE So 4's?
I'm glad you broke down the cost. Helps explain the WHOLE process of building DIY.
Great stuff. I have built a 3s house battery with 600 x 18650 cells for my small motorhome , and also a cranking battery using 8 x headway cells, backing up super-capacitors .
The cranking battery weighs 7kg and is now almost 2 years in service. Cranks a 5 cylinder engine much better than the old style lead-acid.
The house battery, 12v, powers an induction stove through 4000/8000w inverter. Now 12 months old and doing very well for fridge and lights too.
Here's what might help with battery builds... cork floor tiles make excellent insulation and shock absorbing layers. Cork chars but doesn't burn! Also, silicone sheets (place mats from ebay) also doesn't burn, is fairly thin, and acts as a good separation between cells if needed.
Cheers from Oz, JohnT
Thank for that silicon place mat idea!
genius
we are waiting for YOUR video, John. Thanks!
John please make a video. Or maybe post a parts list so we can try to replicate your success.
Please how did you connect those starter battery with BMW circa 400A or more ? Where did you order it? And passive or active balancing?
Thanks, man. Great video! The problem is we can now purchase brand new commercial 1C 12V LiFePO4 batteries, including BMS and warranty at 40AH for $400 and 100AH for $730. This DIY solution is great for a hobbyist but not very cost effective. Thanks again!
Alden Fulcomer where do you purchase those batteries ?
You are gonna pay $730 to replace your car battery!!! Hahahahah you call that cost effective?!! Lmfao!!
IT has nothing to do with the cars. These are drop-in replacements for RV 12v house batteries/solar systems.
@@aldenfulcomer7837 well $500 still cheaper than $700...
@Lola Uro The $500 40AH battery in the video is equivalent to the $400 40AH commercial unit. For $700, you get 150% additional capacity for 57% additional cost.
Wow is all I can say. I’m researching building an RV out of a shuttle bus for me to live in and to use daily to help the homeless. I’m currently homeless and working on selling everything I own to buy and build the RV. I’ve already been making the contacts to be of service to my community. This is what I can see as a great solution to my power source needs.
All I can say is it is because of people like you that I can see my dream come true.
Thanks Jehu. I too have been waiting for an episode like this. I have been wanting to build a starter batter for my cars and this is it! I appreciate the fact that you are doing the R&D for me because I just can't find the time. This will allow me to focus on other projects that use this technology. Well worth my Patreon membership!
This is a great job. I bought a replacement battery with LiFePO4 for my 260 bike after going throughout a couple of lead acid that left me stranded. Never again. Plenty of power and way ligther. I won´t go back ever to lead acid. And with your video, I will make my own now for my cottage in Venezuela. Thanks dude!.
Awesome battery build and an ultra capacitor version would be cool as a starter battery.
5:15 Look up "fish paper" for use in telecom DC power plants. It's cheap, thin and very effective as an insulator. Really enjoy the build video, thanks for sharing.
Been a viewer from the start, never commented. I enjoy watching someone as interested in these batteries as I am. Have built many lithium projects and driven five of my conversions. I am a geek. Cannot help it!
That's interesting Philip, did you build one for your car?
Would it be ideal to make a power bank with these, 38120, batteries or with 18650 batteries?
@@Sr_iRL it depends on energy density you want and cost and how much labor you want to do. Now if going to use the 18650 chemistry it would be more energy dense to use the 21700 cells and if you dont need to cool prismatic or pouch cells may be better. You have to define what your goals for cost labor size energy density whether or not cooling will be needed amp draw etc among other things like the shape of the space they need to fit in etc first.
To recreate this project almost two years after this video, batteries and shipping (US) are costing nearly $800 from your link.
3 years is showing about $400 - used (like he said), but tested cells. Even at $800 it's a pretty awesome setup using 38120HPs
My Sprinter Van will be so happy... My 3 yr old batts are dying.
Many Blessings , SMR
how did u get on this is new tech n alot of duds
Get some Calb lifepo4 Cells theyll last like 10+ years .... Thats what you see at 1:38
Used LiFePO4 cells are definitely worth it as long as they are balanced and not too worn out. And the peace of mind charging with off the shelf 12V chargers is priceless.
I wonder how balancing is maintained in a 8 cell per bank setup like this.
@@GBOAC personally I find it more useful to top balance especially if its just four rows in series. if you search "usb lifepo4 3.6v" on ebay, they will have individual charge circuits you can place on each row of cells for a nice and slow top balance charge.
Use plastic isolation. Cardboard can take on moisture...and moisture conducts.
Thank you very much my friend for your videos. Thanks to you the wait is finally over for my own 38120s. Ordered 8 to make two 12 volt batteries for powering accessories on the electric bikes. I LOVE 12 volts. Just last week ran 12 volt into the house from the solar panel and battery bank. Installed an RV 12volt vent fan to be used as a whole house fan, venting the house and attic. Works great! Also have more than one car stereos running, like the one in the bathroom for a great sounding shower!
Great video. I'm the one who asked you about Headways and the BMS model in the chatroom. Now it's time to see it in action!
About time someone started a DIY Recycle!! I love it!!! Sadly the Buck talks the loudest today, if I had my way, I would have NiFe Cells driving all vehicles, why, because it is "Non-destructive" chemistry, Mr Edison's car is still able to run on his cells, the only replacement is the electrolyte every 30 odd years,, AND that is Potassium Hydroxide -- really good for the garden!!!!! Thank you Jehugarcia!!
After one year this build has entered the territory of purely educational. A 100Ah Battleborn would actually be cheaper than two of these even if you could still source the cells at the stated price. These cells are $88 new.
Still a great build.
Battleborn is that a brand?
Super job of informing us on what can be done and how!
My man what's that beat at 8:31? It really rocked he hard, very awesome project by the way, big ups!
After watching you for a few years now I need to say this I really like the way you do things.
Finally! A thorough video compare to other videos on the web regarding the headway cells. Thermal vid and explanation definitely helps boost confidence when building a high amperage battery pack. Look forward to build a couple. Thanks Jehu!
Thanks for the Video clip! Excuse me for butting in, I am interested in your opinion. Have you ever tried - Rozardner Powerful Battery Reality (erm, check it on google should be there)? It is a smashing one of a kind product for learning how to recondition an old battery minus the hard work. Ive heard some extraordinary things about it and my mate after many years got great results with it.
What ah is this battery
These headway batteries are nice. I build a replacement battery for my lawn mower (36v lead acid). I am able to use the standard charger that came with it. I shorted the batteries a couple time during my build and ruined a few batteries. You definitely need to be careful not to short them.
Very nice video! Great job on that build!
My one and only "issue" however is using 'combustable' cardboard as spacing material.
It could also attract & hold moisture.
As I said however in your 300k video, I'd love to have that for my ham radio gear! Wow! That thing would probably power my 100W radio for nearly a week without recharging. (Avg. radio power usage much less than 100W...) great for emergency communication; like during earthquakes, fires, etc.
Remember, when all else fails (including cell towers!) - ham radio is there!
(During the Paradise fire last year; amateur radio operators were attached to the various command units & fire/emt/equipment trucks to provide communications after all of the local cell towers & CalFire comm. towers failed/burned!)
Swine radio stations haha! Dude why the hell would you listen to pigs during an earthquake? I think ur high af this video is about batteries not imaginary radio stations ran by pigs, TAKE UR MEDS
@@ContentCalvin good luck when your house burns to the ground.
@@mrgeraldbrent mafukka I live in a van down by the river
@@ContentCalvin good luck when the river banks flood over and you are trying to escape but get stuck in the mud...
@@lolouro2266 My van doubles as a pontoon
That burning wrench gave me an idea...
LiFePO4 portable stick welder!
The best video I have watched in years. Very informative.
Liked the video. You have been a good teacher. I built my own power box from your inspiring vids but I couldn't afford a 200 AH lithium battery so I had to make it out of 2 AGM which are heavier than hell. LOL.. But I got it done before our last hurricane and but it to work supporting my refrigerators and freezers. Its all good!
Thank you for building this battery and videoing it and the results.
Thanks for using Watt hour, very useful.
I think it can suffer from temperature elevation due to no ventilation in the box. When new no problem but by aging cells may increase their internal resistance and generate more heat. How do you prevent from that?
just add fan...
I know the movie is old but you did a good job, thank you
Finally! I think as little as a year ago I was looking for a DIY solution and could not find a proper BMS. Thank You Jehu
best battery pack guide for the past 10 years!
Imagine a powerwall made of 10-20 of these batteries......Great Content as alway jehu!!
Was thinking the same thing
For my battery back-up for my house still in Grid , what I see the higher the voltage the less power loses 48v looks like is the lowest power lose ! And you’re video on Lithium Titanate batteries was good heads up Anout 50,000 to 100,000 cycles !
Amazing videos and projects. Both very impressive technically and impressive filming
Glad to see this video since I've been looking at getting the headway cells. Nice job
It is possible that your weight the battery? Thanks cool project.
11.5kg in battery's plus bms case ect. 360g per cell.
This would work great for what I'm doing at my neighbors house house, I'm helping to get her set up with a few solar panels and lights and wind generator. Shes on a fixed income so this looks perfect. Awesome job.
You mean a DIY powerwall for her?
I am a member of a K9 Search and Rescue team who need several smaller amp hour 12v batteries to power our communication equipment. I was thinking of 4s 2p. I wonder if you might give our Search team some pointers on BMS and charging units for a smaller Ah pack. Our team hikes these batteries and comm gear to mountaintops to extend the range of radios, thus the reason for smaller Ah packs.
Great channel and can't wait to see what you're up to next. Any help would be massively appreciated. Dave N2KTO
You are such a good TH-camr I totally enjoyed watching your two tubes to explain the difference with a battery but you can start your car versus you're storing energy for something and how they work together and they don't also like to into the contest to get in the giveaway on that battery that you made
It would have been very nice to see some discussion/commentary about the use of these in a vehicle, and how well they match with the function of the alternator etc without modifying the car. There is a lot of information missing here.
I would love to have a 1 on 1 with jehu asking these questions. I really want a couple of these powering my amplifier for sub system in my truck. But I'm unsure of the amperage and watts and charging system if it were tied into my lead acid under the hood
Mr. Jehu thank you so much for teaching me with this with your videos they are filled with professionalism an exemplary aspiration.
Cardboard is a no-no in electronics, it absorbs humidity (removing its sole purpose here), can be de-integrated by molds, and of course spreads fire if it would even start as smoldering in a corner. He should have used hard plastic plates (just like the material of the box) padded with inflammable, non-static foam on both sides. Imho the sides of the enclosure should have been padded as well to prevent wear from vibrations. Also are the cells just resting on their screws on the bottom??? That would certainly damage the bottom of the box in the long run. Cardboard wouldn't help there, they would sink through it in days.
The example is fine for a 12V power source in your lab or stationary set up, but not really suitable for a car or some other vehicle. You also risk liability when a fire would spread from this, as it doesn't quite meet any safety standards.
Rubber mats bettee optiona
Yup, I use plastic from cheap dollar store school folders. To make it even better, but non-servicable, is to pour casting resin to hold everything in place inside the battery box since vibration from engine will rattle and even unscrew the joints.
@@1FishinAddict resin for the bottom yes, like maybe 1 or 2 cm high, preferably with an already solidified bottom layer before putting in the batteries. But not the entire box as it isolates heat too, and if one cell would emit gasses which then can't escape, you made yourself a little bomb.
Ditto I use scrap Lexan or Plexiglas
I have a LiFePo4 48v 20Ah battery on my 2016 escooter. It's absolutely amazing. I can go 20mile easily on a charge. It's so impressive, that I contacted the person who invented it to thank him. He was awesome, and he also just won a Nobel Prize for all his work with new battery technology. In fact, John Goodenough is currently working on solid state (aka Glass) batteries. He's like 98 years old now, and plugging away like he's 40!
did you really drill into the box while batteries were inside? brave man.
Great video and like how you broke every dollar down at the end. I bought 4 headway cells from battery hook up for my integra was going to just use copper bus bars into the screws and hook it up. But I heard the alternator will constantly charge them making for a very short life. So maybe I should look into a bms
Why would the alternator make a very short life when the regulator takes care of that?
I hear it’s because the difference between lead acid and lithium has different charging methods. Cc cv for lithium
You need dc to dc charger for them
@@dannyw7662 Hey thank you. Was just a couple weeks ago I seen a video about a r enology dc to dc. I’ll have too see how they charge up now I have a bmax charger. I’m guessing I still will want a bms on them.? I’d love to use them as a aux battery in the trunk. Wanted to completely replace but would need more cells.
Nice build. I like the thermal vid. I wonder how it equates in Cold Cranking amps of a car battery?
@Alex Fiet I suspect that the BMS can take care of the Alternator current for charging. As for the cold cranking amps. Jehu mentioned that one of these in dead short should do 200Amps, and he's got 8 cells in parallel, from a CCA standpoint you'd be seeing something like 1600A less any inefficiencies and any 'used battery wear'.
You can't use it to crank some cars. The BMS will shut it down.
put two bms and u would get 400a out. enough for a small engine .
idk but 4 can start a car motor cold. look it up
It's limited by the BMS. 200CCA. If you remove the bms and go straight which I don't recommend, 2400CCA.
im a professional racing drone pilot and ive been trying to figure out a way to charge 4s lipos in the field with 18650's i think i may give something like this a try, love the channel bro ive been watching for a few months now!
Good stuff... is there smaller 12V LiFEP04 batteries you can make? like a in a formfactor of a 12V 7A VSLA? that would be quite a practical portable battery... to be used as UPS replacement or alarm backup batteries
dazza3g just use less cells, still have the same voltage. I don't think it would be very effective tho due to there being alot of wasted space
4 of these in series will be 12V 8Ah. They will be significantly smaller than a 12V 7Ah VSLA (about half size), and be able to deliver significantly higher power (2000w vs ~400w?). They will be lighter and more reliable. But it will be more expensive. I would not choose these cells for UPS though, as there are other cells suited for UPS which is high energy/low power.
Fantastic battery I would like to build 2 of them for my wheelchair, but can't get or afford the parts in the UK. Keep up the good work.
U know you can buy laptop batterys on sale. $20 has like 5 or 6 new batterys in it. So u need 2 or 4 laptop pack. Do you own research. Is called google
@@myes344 do yourself, is called asshole.
@@myes344 I know its been a year or more, but you dont even need to google to know laptop batteries don't use these cells. He says it in the video. Go eat an ant hill.
I do not care about no free battery. You are doing a good job there young man.
With Isaac Arthur, Fraser Cain , Elon Musk , Will Prowse and you of course
All of you are doing a good job at enlightenment to us not so savvy folks.
Thank You
I know this is many months old, yet I still hope you read comments on old videos. AND of course this is a RV Trailer type question, don't run yet. I'm building my own ATV hauler/camper out of a large cargo trailer so maybe that can add to the curiosity to read further. I'm wanting to use LiFePo4 batteries like you have shown here yet up the count to 56 (14x4) to get into that 100Ah range for off grid camping and still being able to enjoy many luxuries while doing so. However I have a nice little 40A rated power panel that is set up for lead acid. Given that this power panel really cannot handle charging LiFePo4 100Ah pack at full speed, I have thought about adding a 300A diode in the output to the trailer power panel to reject incoming power to use a separate 120V charger. I can also easily build a over-volt cutoff as well to disconnect the battery while charging, since when plugged in to mains the power panel is capable of 40A output or less to the trailer electrical at 13.8 - 12.8V. The reason I ask this is during off grid scenarios I may be required to top off my charge with a 4KW nominal generator.
Given this information what charger would be suitable and do you think this would be a beneficial modification for RV use? I patiently await any replies from you or other experts. Thank you all for your time.
Stu
I jst wish i can be blessed with batteries like this, this is the type of things i like spending my time on, are u recruiting?
Fyi you can buy these from Battery Hookup and then make your own
@@iKingRPG I now have 105 ah of headways, got em for $8 a piece from bathookup and the majority test @ 8ah! Its been a fun build but on to the next. Prismatic are my current addiction though the headways are great for 12v high current use.
Hey brotha . Omg this is so incredibly cool. Amazing power and durability. Ideal for what I need. I will dream of this untill I'm dead. I could never afford to build one but this is perfect for my trailer. Your so awesome for sharing the details. It would take me 10 years to buy each part but a guy can dream. Using two old battery's from a diesel truck that my son donated from his job is what I use and omg they are heavy. But they are 4 years old and were treated poorly. When I got them charged fully they were about 12.9 volts. But just don't have the amps in them. This is so hard to charge fast. Takes hours every day to charge with jumper cables and my vehicle. Ahhh . I'm basically homeless as we lost our home . The wife hates it but I'm grateful we have a trailer even though it's old. I'm on disability and dont get squat from social security. This is. Great info. If you ever had and old stuff to donate I'd be the one to help. Anything at this point. I need to use a Bipap machine at night to sleep and it' uses a lot of power with the water chamber on. Without it it's not so bad 6 amps maybe. But the 300 watt inverter just kills the battery before I wake up. I have to hook up a cord to my truck battery when it dies . (usually after 4 hours ) so I get up and do that to get the rest of my sleep. What a bummer it is.
Anyways I just love watching your videos. I'm hooked. I've watched them over and over. But darnit I don't have the money to build one. Arrrgggh. I'm dreaming though. So hey great name and great videos. Keep doing what you do. Old People like me just love this info.
Jehu Garcia peace my brotha.
Hi, I've seen your detailed video & I liked it, however I am always battery-overheating-phobic, wouldn't it be better if you make some ventilation halls on top & bottom of the plastic battery body to allow air circulation, or even better add an electronically controlled fan! this should keep the temperature under control & extend the battery life time, nevertheless Good Job, thumbs up.
Yes, my question exactly.
THIS IS THE VERY BEST BATTERIE VIDEO I HAVE EVER SEEN,AND 12 V ITS EXCELLENT! THANK YOU JEHU,
When are you going to have more of those aluminum busbar plate available?
Looking to replace 36 volt golf cart batteries, currently 6 six volt lead acid. Would 3 of these work for me.
Due to the current being limited to 200 A by the bms, I'd say this would be unsuitable for use on a car. My puny little car uses a battery with a CCA about double the capacity of the BMS on this. Problem 2 with using it in a car is that the charging system on a car is optimised for lead acid, it will stress a lithium based battery. Problem 3, I would be very vary about putting a battery like this in the engine bay of a car lots of heat and vibration at the very least it would cause the screw connections to work loose in short order. Lithium shines in long deep charge discharge cycles which doesn't happen in ICE cars. A car wants several hundred amps for a few seconds to start it, once started the alternator will have it back fully charged within a minute and then the alternator runs all the electrical stuff itself. A car battery in a car will last for years, using a car battery in a deep charge discharge like for solar storage will fook it in a very few weeks. Horses for courses.
most people who are wanting Lithium for a car, aren't wanting 12v, we are wanting them for our sound systems, which typically also includes a high output alternator. I myself am using a Mechman 370 amp Alternator that at idle is 14.4 volts, so for me, I use Lithium that rests at 14.8 when fully charged.
Would love to win that build just built a 14 cell s,6p my self love watching builds like this
Ordered 16 38120 HD 8 ah
Making a portable power box.
I have a 1/2 mile long driveway. I have a harbor freight electric pole saw to keep the brush and branches cut back.
I’d like to make four separate 12 volt batteries.
Wire in series, then in parallel.
Result 24 volt 16 amp system? Right?
Will I need a BMS for all 16 batteries, or one for every 12 volt.
Then a 24 inverter, but what wattage?
Your channel is very informative.
You sorta remind me of a friend I knew while I was on active duty in
the 90’s
I would use a thick plastic plate in between the cells.
Do you mean 'perspex'?
@@johnmcdougall4149 Anything that does the job.
We used to live in this weather and I was happy to talk to you thank you
Please tell in detail about charging battery packs.
In the video, it is shown, but the details are interesting.
Please show us how to build the charger. I live i a Hurricane area and am want to build a pack like this for emergency back up.
@@01wildcardjeff Google Server power supply and DC to DC buck converter... easier to buy than build.
I have so many questions in my head. First of all thank you for the video!
1) Can this really replace a lead acid battery in any car?
2) Could the battery handle heat, temperatures like the lead-acid battery would do?
3) What happens when the alternator's output voltage moves up & down?
4) How can it handle the ups & downs such as when cranking the engine and what not?
5) What are the actual pros & cons of this battery than having a lead-acid battery?
I'm in the brink of kicking this project off, I'm just concerned with question marks in my head!
Could it? Probably yes but would this particular one be cost effective, practical and long lasting more than likely not as much as you are probably hoping or thinking. Even if you took extraordinary and more costly measures to give it the best chance for long term success or had the perfect car in the perfect year round climate I would bet against it. This tech has come a long way but in this particular application IMHO it is probably not quite there yet. There are many other uses where lithium out performs old tech in the long term but I do not see that here yet. That said there is always a cost to good education so if you look at it in that light do not hold back on experimenting and learn things "hands on" because that kind of knowledge has extreme value over your lifetime. That said it would be more cost effective to try one of these www.aliexpress.com/item/4000048426769.html?spm=a2g0o.productlist.0.0.51cd5407uVGzvI&algo_pvid=df879e93-fab8-43ef-a896-5a98e58216b7&algo_expid=df879e93-fab8-43ef-a896-5a98e58216b7-13&btsid=caf40ea1-3d65-4923-a231-df22d6e4d7cb&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_52
Short answer not really, you're looking at least 5x the cost of a car battery. A car battery lasts 5-7 years, this might last 10-20.
Finaly I’ve been waiting so long!!!
What about a heater plate for charging below 32°F? Or will BMS stop charging at 32?
Can your assembled battery replace the traditional car battery?
It's a little small for a car battery, I think he said 35-50ah...that's a lawn mower size battery. A car battery is generally 100+ ah. If you wired 4+ in parallel yes, it would work. That's basically what a Tesla car battery is about 1500 or so 18650 batteries wired in parallel.
@@MichaelCook1981 I planned to make my own lithium battery for my Cressida. But the BMS that can handle 70Amp++ is expensive in my place (70A to crank from cold start, inline-6 2.0L engine)
Great Video, I make a variety of 12v devices, camping lanterns, etc. with cheap lithium cells. No problems so far.
How about a 48 volt version of that??? would be VERY interesting as part of a home backup...
Billblom easier, the 12 is the only one that requires this kind of rare and expensive chemistry
@@jehugarcia 4x12=48 you can use lipos
@@jehugarcia I would think it is getting a lot more common.. now that isn't surplus tesla module type pricing (out of wrecked Teslas) -- is a tad high, but a LOT less prone to having things like fires and the like. A much safer chemistry than the regular Lithium cells, which can do miracles of light and sound if the BMS fails... Looks like the LiFEpo was doing very nicely in your testing.... going with 48v would make the current 1/4 to get the same power out... which means less heating and the like.. Just a bit more $
Thanks for sharing bro I love your channel commenting all the way from Trinidad and Tobago ✌🏾
Need to double up your buss bar, needs to be thicker and it will keep it cooler
tankdog03 buss bar never heated up
@@jehugarcia for it's full potential thicker buss bars are good
@@tankdog03ify More surface area for dissipation is key
I think you have great videos and I enjoy the information you obtain and share with all of us for free. I'm sure it takes an incredible amount of your time not only coming up with the ideas but to also film and edit so again I want to say Thanks. Now here's my question "I'm curious why you tend to test so many of your builds at the maximum amp output?" maybe I'm missing something but while I understand lithiums are far superior to lead acid when handling high loading, no battery will survive anywhere near its advertised cycle life when used in such a way. I don't know about everyone else but I try to size my battery to have at least 10 times the amphour capacity of my average amps consumed during my peak demand period. So if my load at peak usage is 25 amps per hour I would want at least a 250 ah battery to supply power for my needs. This in my thinking keeps the battery from the stresses of heavy discharge and the resulting high current charging. Curious also as to why you did not use copper for the buss bars and heavier cable for your internal leads to output posts and then for your inverter connections? Those cables should have not shown any thermal rise beyond a few degrees.
Did you do any prep with the headways? I have a set and they arent very close in capacities... 5k-7k
Chris Smith I didn’t, but for anyone out there building these you should
Which cells do you recommend for a solar system ? CALB, or Winston Thundersky (yellow) or other brand ?
Love the vid,s. Could I use that as a car battery.?
Looking for a 72v headway battery with a 200amp bms...
Do you make batteries also?
Contemplated using the headway cells on my electric chopper build. Spacing them around the inner diameter of my rear wheel. But I already had a bunch of 18650’s so I used your 1/8th watt resistor idea and built my own pack. Keep at it man. Chopper build seen here th-cam.com/video/IL0hkSwfTFM/w-d-xo.html
Going to use cut top and bottom out of milk jugs on my build to isolate the cell groups between heat shrink on the cheap.
Very well explained first time I understand how to do it in a simple way. VA2SOB - 73
This is helpful and a great battery with long and safe reliability. Many thanks.
Nice project, but for $150 more, lion energy has a substantially more powerful battery that weighs 22 lbs.
Will Prouse tested that battery recently and it's not a true 1200Wh unit - only
@@PhilipLengden Yup. But the watt/per dollar is still great.
nice job Mr Garcia very good very good
For those cells you should run no smaller than 4awg BUT im sure your working with what you have.
It is also a limitation of the BMS units. They are rated for 200 amp continuous but I am skeptical.
That looks like exactly the thing I could use to power my travel trailer. (That and a good inverter!) I could see how a bank of these, some solar panels and a big inverter could run a small house pretty handily. If only I could afford to get into building such a system.
I have the solar panels and inverter. I just need to replace my lead/acid batteries with these and I'm on the road again!
You did a great job on the build and video; however this video demonstrates those headway cells are way to expensive. If you was to use these cells to make a 100AH 12.8v battery it would cost more than the commercialy available Battleborn battery. I have built a few batteries using prismatic cells and 26650's all LiFePO4 and I can build those for far less. For me the whole point of building one is to make one that can handle higher amps and cost less than off the shelf. Having said that he did make an excellent battery pack.
where do you get your 26650 from ?
your video is great, i like the wrench test and the thermal images, very cool
plz make a video on 18650 battery pack cooling solution for electric car, here in Pakistan temperature is hot, if car is parked outside, battery pack will get heatup , what could be best cooling solution for custom made 18650 packs, Air or liquid cooled, both ... anyone every tried ?
Hi Jawad, are you into these batteries. I am happy to discuss in more details.
I'm very interested of winning that battery ,love your easy to understand videos great job !!!
Dude i waited for battery management system, where is it?
Lol under the top cover
This is a Great presentation Jehu. I have loved these cells for a long time. Finally they are back in stock. Thanks!! Weav
You used 32 cells, not 36. Thanks.
Love the simplicity in which your videos put an otherwise black art into layman’s terms. How would I go getting some cells to Australia?
Yep! My question too! Big trouble trying to get batteries in the mail
I am new to this and this is complex I must say.
Check out Will Prowse's channel. he goes over a lot of basics about working with this battery technology with a lot of great products and real world applications that you'll be able to relate to
@@nunyabiz2016 will is NOT this thorough
Excellent video. Very well done and informative. But I'm about to show how ignorant I am regarding lithium batteries with a question. When the amp hour rating of 12v lead acid batteries is calculated the standard seems to be by using a 20 amp load, and if that load is changed it affects the amp hour calculation because of the Peukert effect. Is this not the case for lithium batteries? I'm just trying to understand why you would use the 2kw rate to calculate amp hours rather than the 20 amp rate. Honest question, I really don't know.
I wouldn't recommend buying these seconds 38120' batteries.
Why!
I bought 8 units from Battery hookup @
AU$189.23 (8XAU$ 23.65ea) includes DHL transport
The batteries are very old, manufactured 2016 or 2017.
Nothing in web ad that mentions cell AGE & insulation damage.
Have one dud battery that's under spec @ 3.14v Clearly shows overheating or cooked damage history @ + end.
Not like the others.
The rest are either 3.288v or 3.4v with surface insulation damage.
As price comparison,
I've since discovered, from China, GEB brand NEW
GEB 38120 @ US$12.92PCS + transport for the 38120 battery.
Yep battery hookups is overpriced. The battery he builds in this video would be around the $400 range once you add hardware, box, bms and cells. Definitely not worth the 35AH rating.
I was really contemplating purchasing these cells from Battery hookup until I read your post. Getting duds is what I am afraid because they are used, even though their description says all tested something like 95% and up. I was going to make a 4S10P pack, so 40 cells. Now I don't think I will be ordering any.
Very good project 👍
The price is very expensive
So better to using gel battery
That's where I started. They are just OK,so far. I'm very glad that I didn't start with flooded ones!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I would have blown up my shed by now.
Those batteries are not good for anything that moves at all.
My AGM ones are way safer,but not as good as the ones that are the...best.
Lithium or the ...other ones. I'm too tired to look it up,now. LI FE So 4's?
Would you use this battery setup over the 18650's for a DIY type project? Or for Home storage for solar?