Changes to the center of gravity will be discussed in a future video. There aren’t a lot of places to mount the batteries so it’s a problem I have to work out.
As usual, you make us aware of the real vent points we need to know! Excellent explanation! Looking forward to your decisions on battery location and test drives. Hope your back yard doesn’t have too nice a bed of grass - haha. Next series will be how to build a charging station AND how to keep the kids from fighting over who rides next.
Jeremy Fielding I have a nissan leaf and was wondering if I could put a deep cycle battery in place of the accessory battery? The current battery they use to power the accessories is a basic starting battery. the battery I'm considering is a marine deep cycle 75ah.
Paul McGarr It depends on how much current your accessories will draw. It could be quite a lot if it includes AC and heating. Why would you want to change it? Your manual should specify the minimum requirements for the battery so maybe that will give you the answer.
I appreciate the pop up text correcting yourself or clarifying things. It's hard to say things exactly right every time but you are taking the time to make sure people have accurate information. Side note: the Sealed Lead Acid batteries like the one you pulled from a Power Wheels are the same kind they use in computer Battery Backup or Uninterruptible Power Supplies. If you ever try to salvage batteries from a UPS they tend to be bad since they draw so many amps from the battery which heats them up, and they get discharged so deeply since they are meant to sustain a desktop computer and monitor for a few minutes until you can save your work and shut down. 550VA (common size UPS) generally have 7Ah 12v SLAs, for example if your UPS is holding up 350W that means at least 30A is being pulled from the battery which means that you won't be getting 7Ah out of it plus if the computer is not configured to shut down quickly enough the battery will drain to the point the UPS will cut out. UPS are great since they are a battery charger and small inverter in one, but the batteries are almost always bad if you find them used.
Why not use cordless tool batteries, like dewalt 60v batteries, or Ryobi 40v? Their cheap and light weight. What are your thoughts? I was planning on making an electric bicycle and was going to try to use these batteries in my project.
Jeremy, First off, I love your channel and your videos. I have a project I'm working on but I'm stuck. What's the best way to contact you with a few questions? Again, thank you especially for your motor videos. They are very good and extremely helpful.
My contact information is on my about page. But, I unfortunately can’t do one on one consulting. Please understand I get hundreds of emails and messages asking for help and it isn’t practical or safe to do it this way.
Another excellent vid Jez. One of the most intelligent engineering/making channels on TH-cam. Thank you for all the effort and thought you put into your vids. Looking forward to more of ths project!
Hey Jeremy, I purchased an off road led light bar for my go kart as well as some led strip brake light and design lights. i also plan on purchasing a (1.5 watt) solar battery trickle charger that clamps on directly to a 12v battery and mounts on top of the kart to keep the battery charged. (note: the 21 inch light bar says "10-30v" and "120w" on the box) whats your thoughts on the battery charger? do you think its a good idea and do you think it'll work? and what battery would be suitable in my scenario -Thanks
ebay has a guy that is reasonable called alarmhookup. it might be more work to build battery but the cycle life is another factor though leadacid if treated right can last beyond standard labeled life. some ppl dump and filter the acid then flush with de-ionized water then put back old acid mix and top off with water. this might work on your dead battery i hear a little epsomsalts in each cell chamber helps too on old leadacid. ecars are more everyday even jag has one now check your junk yards and crash holding lots by dealer ships. alarmhookup does have ok prices but the deals you have to wait for then jump on i have a max price perwatt ill pay. im not sure how you feel about sponsors but some battery company might do you a deal or give you free for promotonal
I am intending to build an electric scooter with a motor with these specifications: 48V-1000W-26.7A. I did some research and found a battery with these specifications: Lithium battery - 48v, 100000mah, 1000w, 13s3p, xt60, 48v, 54.6 ah pack. Do you think this battery would be good for the engine I'm going to use?
I an Enzo from Italy. Thank you for your very interesting videos. I need your help in order to choise the right battery for a winch. I have just bought a Rhino 12 V 4500lbs (2040 Kg) winch for loading and downloading my boat (1100 Kg) from and to the sea. I would like to know wich battery do I have to bought IOT load and download my boat from the trolley ? The Rhino instruction says that the battery should be minimum 12 AH. It seems to me too low. Could you please give your opinion ? Thank you very much .
for that small battery 12v12ah, its not 12A for 1 hour OR 1A for 12 hour .... a lead acid battery is odd that way... fact is, if the battery is 12Ah (20h) and you take the full 12A out, you end up with a smaller Ah battery ....if memory serves it will be around 25% lower so you end up with just 9Ah. at 0.6A, it willbe good for 20 hour at 0.3A it will be longer :) also, keep in mind that a start battery should only be discharged around 20% (meaning a 100Ah batt leves 80Ah more or less unused) a deep cycle battery can discharge 80% so only 20% is unused in both cases, using more power will shorten the battery lifespan . small rule of thumb about kWh rating .... 25kg lead can store around 1kWh (just imagine the weight without acid and casing ) higher current means bye bye capacity
When you mentioned where the batteries will go I thought, ok I'll bet he rethinks this and comes up with a novel solution. So, I'll sit back and watch. Can't wait to see what you come up with. Ten thumbs up on another thoughtful effort!!
So just found out that some of those kids electric vehicle things (peg perego brand) actually use two of those little 4.5Ah 6v "emergency light" batteries (the one you said is obviously no good) in series inside a little case. Might not be great capacity or current, but they do work in the little plastic cars, and at least if you figure this detail out, they're cheap to replace. I assume economies of scale on that relatively standard size is why the company used those.
The argument could be made that this should be the Fielding-Edison cart. Tesla promoted AC, while Edison promoted DC in the War of the Currents. The cart will be DC. Boy that is a bummer because Tesla just sounds so much cooler. I never understood why the Tesla car company wasn't the Edison company. Not a criticism at all....just a random thought I wanted to share.
On Facebook there is a new group that just started up called "Jehu's DiY Powerwalls", started by the TH-camr "jehugarcia" who has converted an old VW bus to electric, powered by lithium ion batteries. The Facebook group, although it was created only a month or two ago, has a lot of awesome people sharing their projects, tips and tricks about using lithium ion batteries. The power density of lithium vs lead acid is just ridiculous. It really makes thinking about converting a vehicle an attractive idea.
If you are able to get a hold of junk laptop batteries or bad 'hover board' batteries or similar, you can tear them apart and test each cell with a ~$30 tester and throw out the bad ones. That is how most of the guys are doing it.
Excellent video Jeremy, as always! Have you any concerns about mounting the batteries that high, and raising the center of gravity? If you can fit them between the wheels, the c-o-g would be low and less prone to rolling over, or am I overestimating the weight of the batteries?
Mphymel My thoughts as well, the center of gravity will be high making it easier to roll over. The other issue is that the suspension was not designed for that much weight. The original motor was on the unsuspended lower portion (which has its own issues), so it's weight was not on the springs. Putting 300lbs of battery up there will bottom the springs out (if not immediatly, at least when you add a rider).
My motor weighs considerably less then the original motor. I have already check the weight capacity of the go kart manual and adjusted for the weight I am removing. That is not a concern.
Rather than running with a a bum alternator, Reserve Capacity may tell the driver how long they can safely operate their electronics without the engine running. 25 amps at 12 volts is 300 watts, which is a pretty substantial draw. So if your gear draws under 100W, you can safely park all night without idling, for example. 🤔
Cool video .. I have a yerf dog too, which I got for my self . And slowly putting back together for my one and a half year old son, after watching your video I realized it's for kids and so I TRIED to get in it to no avail Damm 😭😭😭
Jeremy, your content is absolutely fantastic, it's so cool to know other people can get enthusiastic about things like centrifugal switches! I have found places that 18650 Lithium cells from recycled laptops etc. They seem to have a very reasonable price point, and I have seen some people build rather large battery packs out of them with 100 or more 18650 cells. Do you think such cells could make a practical alternative to a lead acid battery?
Remember to hook up the battery monitor or battery management system, what ever its called. To lithium batts its a must! Otherwice you run one battery empty while others are quite full and then the empty one will die.
Years ago I took an introductory electrical engineering course. One of the topics it covered was the Thevenin model of a power source (see en.m.wikipedia.org/wiki/Th%C3%A9venin's_theorem). It says that a power source (like your batteries) can be modeled by an ideal voltage source (which will always put out a specified voltage no matter what the load) and a resistor that is in series with the load. This resistance is referred to as the Thevenin resistance or as the internal resistance. In the case of your batteries, this is a way to model how the output voltage will drop as you draw more current. The Thevenin voltage is what you measure with a volt meter under no load. You can estimate the internal resistance by connecting a load of known resistance to the battery, then measuring the voltage drop or current and applying ohm's law. The chemistry in batteries might not lent to such a simple model but the model will still probably hold within some range if current draws. Depending on your education background, you may have already learned this. I figured I'd mention it in case it's helpful to you or if any if your viewers want to dive in a bit deeper.
I had always wondered what was different about a deep cycle battery that allowed it to function fine in conditions that would kill a standard starting battery, very good info, thanks! One thing to mention about battery ratings, as you look at batteries you sometimes see batteries with a label that says CA, short for Cranking Amps. It is my understanding there is no industry standard for CA, where there is a standard for CCA. The CA rating is normally seen on cheap batteries and is usually a lot higher than the normal CCA rating. It is important to compare apples to apples so make sure to look for and compare CCA ratings.
A thought comes to mind that should work very well in theory, but I am unsure if it is doable in practice. The early Prius' sold are just coming to an end of their battery life. If you could get your hands on an old one you could take it apart and make your own battery out of the cells that are still good. It would be a pain but it would deliver the most bang for your buck, offer the greatest weight/power option available, and make it so you could mount the cells lower on the frame for better weight distribution. But in theory it is the best option.
You have to do a video on lead acid lithium ion and silicone(gel) batteries. For us your getting so many views because of your understanding and the lack of understanding of others
Jeremy, this is a great channel. I enjoy your projects. After seeing your work with inverters and now batteries, any chance of a portable solar generator in the near future? Thanks again
An excellent video Jeremy. This will be included in my electronic engineering students' essential viewing next week as you explained it all so clearly.
Hey there, I have a lead acid battery with both terminals got corroded badly so I want to ask are those terminals replaceable? Or just throw away and buy a new one? I frequently test run many type of starter motor many time/per day by directly connected the battery which leaded to recharging the battery multiple time in one single working day.
I don't do what you do but absolutely love to learn. You are an excellent teacher. I have a multimeter. We will be traveling a lot going forward with a small trailer that stores solar power in a LA battery. Would owning a battery tester be helpful or unnecessary. If necessary, would the one you use be adequate or would a cheaper model be adequate? Thanks!
I can't adequately answer that question for you. But, If you rely on batteries, it would certainly be a good choice to have a battery tester of sufficient size to check your batteries. You can investigate and fill in the blanks.
Just make sure you have appropriate shocks that wont return in kind the force you're going to exert on them while riding around. I also imagine you'll be adding appropriate counter weight to the front of the cart to correct weight bias. Thank you professor Fielding on the video. your videos are like new toys for Christmas. Just can't wait for them!
While I didn't want to modify the kart, I decided they are just too high in the back. I had to cut some steel and move a few things but they are low and up front now.
Interesting video. In trade school, we were told to be more careful handling old batteries. Batteries tend to accumulate sediments as they age, and tumbling them around can get the sediments stirred up enough to cause bridging between positive and negative plates. That's one of the reasons why maintaining a car's suspension is important. I hope you didn't short out any cells. How old is that first group of batteries? They didn't look new. 👍
Well. It’s for family fun... I just mean It is only fun if I take a kid with me. I don’t care to ride one by myself. so I wanted a two seater. They won’t ride it without me. They are not old enough for one this size.
I have a single-phase induction AC motor from an old garage door opener. I'm fairly new when it comes to these things, but is there a way to convert the motor into a DC motor?
No...but I have a series of videos on how motors work for beginners which you might enjoy. It starts with video #036. I explain the different motor types how they work with easy to understand demonstrations and you see all the inner works.
Lol 1:42 would have been a great time for an edit... maybe a lot of sparks, yelling, silence then cut to you waking up dazed and looking burnt up. Great content as always, very informative!
I must agree... that would have been hilarious! I wish I had thought of it. I know dry hands on 12 volts is nothing, but it certainly would have startled a lot of people
Jeremy Fielding yeah I know it's totally safe, it's funny to think about people's reactions though! My little bro had the same little buggy btw (at least the size and frame look identical). We had tons of issues with it's gas motor though, seemed to be in need of constant maintenance. A DC conversion would have been a fun project and likely would have made it more reliable.
I figured based on your response you understood, but others look for my comments so I just thought it was worth mentioning if the safety police come along and read my response
It’s a short term project. I am doing this project because it is the most requested build I have. I will ride the kids around for a few months and sell it. It is about the experience and learning not a long term money saver.
Basically I said discussion of lithium vs lead acid was outside the scope of what I considered to be the essentials... and I would leave that to viewers to exploring more detail. There are already lots of videos on that topic.
I want to set up car batteries and ether use an inverter or a transformer to see if i can mimic a power outlett for use outside and then hopefully figure out a way to charge them probably using an alternator.... Would this work?
Yeah... I thought about it, but that discussion goes way to deep to really cover it. I just wanted to introduce people to the topic as it relates to go karts and e-bikes. There are already a lot of videos on Lithium vs lead acid. Since I wasn't going to buy lithium, I thought I should just skip it to keep my videos short and concise. As a side note I have also found that when I have more than one or two sub topics, people don't watch the whole video. When watch time gets too short TH-cam doesn't recommend your video anymore. The attention span these days. LOL
Changes to the center of gravity will be discussed in a future video. There aren’t a lot of places to mount the batteries so it’s a problem I have to work out.
As usual, you make us aware of the real vent points we need to know! Excellent explanation! Looking forward to your decisions on battery location and test drives. Hope your back yard doesn’t have too nice a bed of grass - haha. Next series will be how to build a charging station AND how to keep the kids from fighting over who rides next.
YOU KNOW YOU WANT A CART AS WELL HAHAAH WE ARE ALL BIG KIDS AT HEART!! LOVE YOUR PAGE OLD ONE LEGGED JOSEPH T RETIRED NAVY
Jeremy Fielding I have a nissan leaf and was wondering if I could put a deep cycle battery in place of the accessory battery? The current battery they use to power the accessories is a basic starting battery. the battery I'm considering is a marine deep cycle 75ah.
Paul McGarr
It depends on how much current your accessories will draw. It could be quite a lot if it includes AC and heating. Why would you want to change it? Your manual should specify the minimum requirements for the battery so maybe that will give you the answer.
i was just about to say something about center of gravity. hmm.
I appreciate the pop up text correcting yourself or clarifying things. It's hard to say things exactly right every time but you are taking the time to make sure people have accurate information.
Side note: the Sealed Lead Acid batteries like the one you pulled from a Power Wheels are the same kind they use in computer Battery Backup or Uninterruptible Power Supplies. If you ever try to salvage batteries from a UPS they tend to be bad since they draw so many amps from the battery which heats them up, and they get discharged so deeply since they are meant to sustain a desktop computer and monitor for a few minutes until you can save your work and shut down. 550VA (common size UPS) generally have 7Ah 12v SLAs, for example if your UPS is holding up 350W that means at least 30A is being pulled from the battery which means that you won't be getting 7Ah out of it plus if the computer is not configured to shut down quickly enough the battery will drain to the point the UPS will cut out. UPS are great since they are a battery charger and small inverter in one, but the batteries are almost always bad if you find them used.
thanks for that info Fooxz
Your videos are always so informational. Thanks!
Why not use cordless tool batteries, like dewalt 60v batteries, or Ryobi 40v? Their cheap and light weight. What are your thoughts? I was planning on making an electric bicycle and was going to try to use these batteries in my project.
Jeremy, First off, I love your channel and your videos. I have a project I'm working on but I'm stuck. What's the best way to contact you with a few questions? Again, thank you especially for your motor videos. They are very good and extremely helpful.
My contact information is on my about page. But, I unfortunately can’t do one on one consulting. Please understand I get hundreds of emails and messages asking for help and it isn’t practical or safe to do it this way.
Jeremy Fielding. I completely understand. Thanks for all the great videos. Keep up the good work.
I didn't know the difference between starting and deep cycle batteries. Thanks for that!
Another excellent vid Jez. One of the most intelligent engineering/making channels on TH-cam. Thank you for all the effort and thought you put into your vids. Looking forward to more of ths project!
Thank you Jeremy. Looking forward to more in this series.
Fantastic information and very well produced and good delivery of technical data. I love your videos and as always have a great day sir!
Hey Jeremy, I purchased an off road led light bar for my go kart as well as some led strip brake light and design lights. i also plan on purchasing a (1.5 watt) solar battery trickle charger that clamps on directly to a 12v battery and mounts on top of the kart to keep the battery charged. (note: the 21 inch light bar says "10-30v" and "120w" on the box)
whats your thoughts on the battery charger? do you think its a good idea and do you think it'll work?
and
what battery would be suitable in my scenario -Thanks
ebay has a guy that is reasonable called alarmhookup. it might be more work to build battery but the cycle life is another factor though leadacid if treated right can last beyond standard labeled life. some ppl dump and filter the acid then flush with de-ionized water then put back old acid mix and top off with water. this might work on your dead battery i hear a little epsomsalts in each cell chamber helps too on old leadacid. ecars are more everyday even jag has one now check your junk yards and crash holding lots by dealer ships. alarmhookup does have ok prices but the deals you have to wait for then jump on i have a max price perwatt ill pay. im not sure how you feel about sponsors but some battery company might do you a deal or give you free for promotonal
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I am intending to build an electric scooter with a motor with these specifications: 48V-1000W-26.7A. I did some research and found a battery with these specifications: Lithium battery - 48v, 100000mah, 1000w, 13s3p, xt60, 48v, 54.6 ah pack. Do you think this battery would be good for the engine I'm going to use?
I an Enzo from Italy. Thank you for your very interesting videos. I need your help in order to choise the right battery for a winch. I have just bought a Rhino 12 V 4500lbs (2040 Kg) winch for loading and downloading my boat (1100 Kg) from and to the sea. I would like to know wich battery do I have to bought IOT load and download my boat from the trolley ? The Rhino instruction says that the battery should be minimum 12 AH. It seems to me too low. Could you please give your opinion ? Thank you very much .
for that small battery 12v12ah, its not 12A for 1 hour OR 1A for 12 hour ....
a lead acid battery is odd that way...
fact is, if the battery is 12Ah (20h) and you take the full 12A out, you end up with a smaller Ah battery ....if memory serves it will be around 25% lower so you end up with just 9Ah.
at 0.6A, it willbe good for 20 hour
at 0.3A it will be longer :)
also, keep in mind that a start battery should only be discharged around 20% (meaning a 100Ah batt leves 80Ah more or less unused)
a deep cycle battery can discharge 80% so only 20% is unused
in both cases, using more power will shorten the battery lifespan .
small rule of thumb about kWh rating .... 25kg lead can store around 1kWh (just imagine the weight without acid and casing )
higher current means bye bye capacity
Looks good I've been thinking about doing this for the kids ,I've already converted my riding lawnmower to electric
When you mentioned where the batteries will go I thought, ok I'll bet he rethinks this and comes up with a novel solution. So, I'll sit back and watch. Can't wait to see what you come up with. Ten thumbs up on another thoughtful effort!!
Sounds like you are a fun dad. Looks like a fun project for the kids.
So just found out that some of those kids electric vehicle things (peg perego brand) actually use two of those little 4.5Ah 6v "emergency light" batteries (the one you said is obviously no good) in series inside a little case. Might not be great capacity or current, but they do work in the little plastic cars, and at least if you figure this detail out, they're cheap to replace. I assume economies of scale on that relatively standard size is why the company used those.
I mean, it's really just amps and volts (watts)
love your channel. question... have you considered trying to get those batteries a little bit lower to avoid the risk of the cart rolling over?
Check the description
ahh sorry... i missed that. Best of luck man! Can't wait to see how the Fielding-Tesla cart turns out!
The argument could be made that this should be the Fielding-Edison cart. Tesla promoted AC, while Edison promoted DC in the War of the Currents. The cart will be DC. Boy that is a bummer because Tesla just sounds so much cooler. I never understood why the Tesla car company wasn't the Edison company. Not a criticism at all....just a random thought I wanted to share.
Will you do a video on NiFe batteries?
I like the battery load meter. I probably get one of those, thanks.
Thank you Jeremy. You make us less stupid ☺️
If you use lithium ion batteries ever, can you please cover them.
Can you put a Tesla coil on your go-kart for charging just a thought 🤔
On Facebook there is a new group that just started up called "Jehu's DiY Powerwalls", started by the TH-camr "jehugarcia" who has converted an old VW bus to electric, powered by lithium ion batteries. The Facebook group, although it was created only a month or two ago, has a lot of awesome people sharing their projects, tips and tricks about using lithium ion batteries.
The power density of lithium vs lead acid is just ridiculous. It really makes thinking about converting a vehicle an attractive idea.
Lithium is fantastic... and that is reflected in the cost. I think if you have the budget you get way more stored power per lb.
If you are able to get a hold of junk laptop batteries or bad 'hover board' batteries or similar, you can tear them apart and test each cell with a ~$30 tester and throw out the bad ones. That is how most of the guys are doing it.
What does it mean when it says 26r-2 or 26r-3? I don’t get the 2 and 3
Excellent video Jeremy, as always! Have you any concerns about mounting the batteries that high, and raising the center of gravity? If you can fit them between the wheels, the c-o-g would be low and less prone to rolling over, or am I overestimating the weight of the batteries?
My concern as well.
i third the concern. way too high.
Mphymel
My thoughts as well, the center of gravity will be high making it easier to roll over. The other issue is that the suspension was not designed for that much weight. The original motor was on the unsuspended lower portion (which has its own issues), so it's weight was not on the springs. Putting 300lbs of battery up there will bottom the springs out (if not immediatly, at least when you add a rider).
Yes.... I am aware of the change in COG I am reviewing the options now but there aren’t many options
My motor weighs considerably less then the original motor. I have already check the weight capacity of the go kart manual and adjusted for the weight I am removing. That is not a concern.
how can i test and find if a battery is fully chargered or not?
Grab so lifepo4 batteries off Alibaba for $350
Excellent! . . . . . As usual!
Love your videos Mr.Fielding.
Long time watcher.
Subscribed !
Rather than running with a a bum alternator, Reserve Capacity may tell the driver how long they can safely operate their electronics without the engine running. 25 amps at 12 volts is 300 watts, which is a pretty substantial draw. So if your gear draws under 100W, you can safely park all night without idling, for example. 🤔
Very informative. Thank you. And BTW you've got to be the coolest dad on the block. Enjoy.
Thank you for clear, articulate and informative videos. You are a gifted instructor. (I know; I am a former university law lecturer.)
Cool video .. I have a yerf dog too, which I got for my self . And slowly putting back together for my one and a half year old son, after watching your video I realized it's for kids and so I TRIED to get in it to no avail Damm 😭😭😭
Jeremy, your content is absolutely fantastic, it's so cool to know other people can get enthusiastic about things like centrifugal switches! I have found places that 18650 Lithium cells from recycled laptops etc. They seem to have a very reasonable price point, and I have seen some people build rather large battery packs out of them with 100 or more 18650 cells. Do you think such cells could make a practical alternative to a lead acid battery?
Remember to hook up the battery monitor or battery management system, what ever its called. To lithium batts its a must! Otherwice you run one battery empty while others are quite full and then the empty one will die.
Years ago I took an introductory electrical engineering course. One of the topics it covered was the Thevenin model of a power source (see en.m.wikipedia.org/wiki/Th%C3%A9venin's_theorem). It says that a power source (like your batteries) can be modeled by an ideal voltage source (which will always put out a specified voltage no matter what the load) and a resistor that is in series with the load. This resistance is referred to as the Thevenin resistance or as the internal resistance.
In the case of your batteries, this is a way to model how the output voltage will drop as you draw more current.
The Thevenin voltage is what you measure with a volt meter under no load. You can estimate the internal resistance by connecting a load of known resistance to the battery, then measuring the voltage drop or current and applying ohm's law.
The chemistry in batteries might not lent to such a simple model but the model will still probably hold within some range if current draws.
Depending on your education background, you may have already learned this. I figured I'd mention it in case it's helpful to you or if any if your viewers want to dive in a bit deeper.
I know the battery that all the trackday/car guys where thinking about when you where doing your gocart: Braille .
I had always wondered what was different about a deep cycle battery that allowed it to function fine in conditions that would kill a standard starting battery, very good info, thanks! One thing to mention about battery ratings, as you look at batteries you sometimes see batteries with a label that says CA, short for Cranking Amps. It is my understanding there is no industry standard for CA, where there is a standard for CCA. The CA rating is normally seen on cheap batteries and is usually a lot higher than the normal CCA rating. It is important to compare apples to apples so make sure to look for and compare CCA ratings.
A thought comes to mind that should work very well in theory, but I am unsure if it is doable in practice.
The early Prius' sold are just coming to an end of their battery life. If you could get your hands on an old one you could take it apart and make your own battery out of the cells that are still good. It would be a pain but it would deliver the most bang for your buck, offer the greatest weight/power option available, and make it so you could mount the cells lower on the frame for better weight distribution.
But in theory it is the best option.
That would be a pain... and I agree that would be awesome if someone was willing to put in the work.
I dunno, it doesn't look to awful hard assuming you could get your hands on one.....
th-cam.com/video/PIi51tHPSvY/w-d-xo.html
You have to do a video on lead acid lithium ion and silicone(gel) batteries. For us your getting so many views because of your understanding and the lack of understanding of others
exellent
Jeremy, YOU absolutely need a go kart!!
Excellent video as usual.
Jeremy, this is a great channel. I enjoy your projects. After seeing your work with inverters and now batteries, any chance of a portable solar generator in the near future? Thanks again
thanks for the video,
just waiting for February. ever think about doing a video on free power ? or do you believe in the lie's that has been tough?
Always learn something from your videos thanks alot 👍
Great videos!!! You give a ton of technical information but keep it relevant to a project I could tackle.
An excellent video Jeremy. This will be included in my electronic engineering students' essential viewing next week as you explained it all so clearly.
You have done your homework well and make a great presentation. Many thanks!
Hey there, I have a lead acid battery with both terminals got corroded badly so I want to ask are those terminals replaceable? Or just throw away and buy a new one?
I frequently test run many type of starter motor many time/per day by directly connected the battery which leaded to recharging the battery multiple time in one single working day.
I don't really know. I would call a local battery dealer with that kind of question. They should know
Alright then, thanks for the reply.
nice video well explained ., thank you sir.
this is going to be good :)
Great information, thanks for sharing! : )
do a collab with a power wall channel!
Battery dissection!
I don't do what you do but absolutely love to learn. You are an excellent teacher. I have a multimeter. We will be traveling a lot going forward with a small trailer that stores solar power in a LA battery. Would owning a battery tester be helpful or unnecessary. If necessary, would the one you use be adequate or would a cheaper model be adequate?
Thanks!
I can't adequately answer that question for you. But, If you rely on batteries, it would certainly be a good choice to have a battery tester of sufficient size to check your batteries. You can investigate and fill in the blanks.
Just make sure you have appropriate shocks that wont return in kind the force you're going to exert on them while riding around. I also imagine you'll be adding appropriate counter weight to the front of the cart to correct weight bias. Thank you professor Fielding on the video. your videos are like new toys for Christmas. Just can't wait for them!
While I didn't want to modify the kart, I decided they are just too high in the back. I had to cut some steel and move a few things but they are low and up front now.
Interesting video. In trade school, we were told to be more careful handling old batteries. Batteries tend to accumulate sediments as they age, and tumbling them around can get the sediments stirred up enough to cause bridging between positive and negative plates. That's one of the reasons why maintaining a car's suspension is important. I hope you didn't short out any cells. How old is that first group of batteries? They didn't look new. 👍
They are new-old batteries. Maintained but never in service. They shouldn’t have any problems and are under warranty.
No gocart for Jeremy....lol...watch he will get one.....LOL
Well. It’s for family fun... I just mean It is only fun if I take a kid with me. I don’t care to ride one by myself. so I wanted a two seater. They won’t ride it without me. They are not old enough for one this size.
I would think you would want to put all that battery weight lower to keep turning more stable.
check the description
Another great video.
Are you going to add a parental speed control or remote shut off?
I am considering it. But I don’t plan to let the kids drive it
I am wondering if that tray on the go cart frame can handle the weight of those batteries?
I will find out. Not many other options lol
I have a single-phase induction AC motor from an old garage door opener. I'm fairly new when it comes to these things, but is there a way to convert the motor into a DC motor?
No...but I have a series of videos on how motors work for beginners which you might enjoy. It starts with video #036. I explain the different motor types how they work with easy to understand demonstrations and you see all the inner works.
Ok. Thanks.
Dude what level legend are you ?
I am not old enough to be a legend but maybe one day :)
Lol 1:42 would have been a great time for an edit... maybe a lot of sparks, yelling, silence then cut to you waking up dazed and looking burnt up. Great content as always, very informative!
I must agree... that would have been hilarious! I wish I had thought of it. I know dry hands on 12 volts is nothing, but it certainly would have startled a lot of people
Jeremy Fielding yeah I know it's totally safe, it's funny to think about people's reactions though! My little bro had the same little buggy btw (at least the size and frame look identical). We had tons of issues with it's gas motor though, seemed to be in need of constant maintenance. A DC conversion would have been a fun project and likely would have made it more reliable.
I figured based on your response you understood, but others look for my comments so I just thought it was worth mentioning if the safety police come along and read my response
have you looked into caraudio lithium batteries like jy power or xs?
Lithium makes the cost to high for my budget
Jeremy Fielding only short term. Long term deep cycles won't last as long.
It’s a short term project. I am doing this project because it is the most requested build I have. I will ride the kids around for a few months and sell it. It is about the experience and learning not a long term money saver.
hi
hi
LOL
What about lithium ion batteries?
I am guessing you didn’t watch the whole video 😂
I did, must of missed your mention of Lithium Ion
Basically I said discussion of lithium vs lead acid was outside the scope of what I considered to be the essentials... and I would leave that to viewers to exploring more detail. There are already lots of videos on that topic.
reccomend buying 18650s of aliexpress and building a lithium pack for ebike/emotorbike
What better did he end up using all of these batteries look like trash lithium for the win
I kept thinking you were going to touch both terminals at once and shock yourself
I want to set up car batteries and ether use an inverter or a transformer to see if i can mimic a power outlett for use outside and then hopefully figure out a way to charge them probably using an alternator.... Would this work?
Good video but was hoping you would get into comparing lithium batteries to lead acid.
Yeah... I thought about it, but that discussion goes way to deep to really cover it. I just wanted to introduce people to the topic as it relates to go karts and e-bikes. There are already a lot of videos on Lithium vs lead acid. Since I wasn't going to buy lithium, I thought I should just skip it to keep my videos short and concise. As a side note I have also found that when I have more than one or two sub topics, people don't watch the whole video. When watch time gets too short TH-cam doesn't recommend your video anymore. The attention span these days. LOL