Absolutely spot on. I land my lipos around 3,6 - 3,7V and my even 7 years old batteries are still holding strong. Thank you for sharing your knowledge and making easy to understand video for people who are just learning about lipos. 👍🏻
Thanks for this. Just getting back into the hobby after 20 years off. Flew gliders off the cliffs in Palos Verdes. CA years (ages) ago, everything from floaters to jet style gliders, the only batteries I had to worry about was for the receiver and servos, and I could even just used ni-cad, or even alkaline, AA's, but just got a Valiant recently, got the batteries, the chargers, the checkers, etc., etc., but just not the knowledge of how/what/why to do with them. Got a better understanding now. Thanks.
great video I have the same charger as the one in the vid and it's a pretty good charger for the price, highly recommended. I think you should do a few tutorials from beginning to the end about making an fpv wing (including all RC link stuff)
Nice video reminder of how to safely store Lipo batteries - there a lot of misconceptions about lipo batteries - common sense and knowing the proper maintenance of these.
Hi! I have been in a debate with another member of my club over the safety/advisability of storing either single cell (1s) or multicell batteries in groups held together by charging cables that maintain parallel connections between batteries. I am rarely able to charge my batteries before I get home from a flying outing, but I conscientiously check and storage charge my batteries when I get home. During the period between use and checking/charging, I like to connect my used batteries to the unused or randomly available batteries of the same type. This keeps batteries that get discharged below 3.7v per cell from staying that way for more than 10 minutes after being used. I am aware that charging batteries that are of a different type (NM Hydride, Lipo=Lithium polymer, Li Ion, LiFePO4) or "C" rating can be dangerous, but I contend that storing my batteries of the same type in parallel groups gently recharges batteries in deep discharge by the other batteries in the group, and that this practice is safer than waiting till I get home to test and possibly dispose batteries in deep discharge (
I don't like connecting cells in parallel with substantially different voltages, but I don't have any objective evidence to say what is acceptable vs unacceptable delta. Over time cells in parallel will balance each other. C-rating is immaterial. Chemistry is immaterial as long as you have like voltages. i.e. If you have one cell @ 2v and a lipo @ 3.6v you might get sparks when you connect them and the lipo may wind up damaged as it feeds 3.6v to the lower 2v to balance at 2.8v.
Very good overview and details for safety and cell life. The advice for maximum charge voltage vs cell cycle life is great. Now I want to learn more about the useful capacity with that tradeoff to decide how much field time is compromised. I suspect that much of the degradation of cell life with a full charge corresponds to the time period (and temp.) in that state. For example, if I conservatively charge to 4.2V and soon afterward apply the battery, what's the tradeoff vs a 4.1V peak charge?
Tradeoff for peak as you've identified is always time. According to an MIT paper I read on LIPO testing the lifetime of a LIPO can be extended something crazy like 75% just by limiting peak to 4.18v/c. I would challenge you to do an experiment and fly 6 packs at 4.18 and 6 packs at 4.20. Use a low voltage sag logic setup (like this: th-cam.com/video/Q5s7zB0NDCQ/w-d-xo.html) record your results and see for yourself the actual difference. In fact---this might make a good video.
Appreciate the feedback. I use an iCharger 306B as the main desktop charger. The charger in this video is a Toolkit M8S. I love that little charger. Here's an affiliate link if you want to check one out. www.banggood.com/custlink/KKKRJlHuKW
I apreciate the link.i am tired of the I max or b6.They constantly are inconsistent,with under or over charging for me.I am frustrated with the 20 differant spektrum options every other week.I just want an economical,reliable easy to use charger.
@@seanpettit6410 ISDT makes some really good products. They aren't too expensive, but they're not bargain basement either. I don't understand how they sell the Toolkit M8S for that price and it does handle 400w. I tested it.
Thanks man! You didn’t include a “recommended” recharge amperage. Some batteries actually have markings for MAX recharge rates. I tend to stay with 1C to no more than 2C, when recharging.
I used to charge Zippy compacts at 5c which was a safe charge level according to their own labeling. I stopped that years ago though. Just 1c to charge for me.
Exactly what I needed to know! Thank you! Do you have a recommendation for a LiPo storage container and/or charging bag? Would they really contain a potential fire?
Thank you John for your informative and honest videos. May I have a clarification on how to charge 1S whoop batteries on a parallel board? I have seen a mixture of hacks on TH-cam but not sure which is the best practice.
Rules for parallel charging are rather simple: Same voltage with +/- 0.05v to start. You can use the combined amperage for the charge. i.e. If each battery can take 1a and you charge 6 batteries at a time, you can use 6a.
That's very nice information sir..I have a question..why my new 4s lipo. Even I full charge 16.8. when I checked at cell meter every cell is just 4.1plus it didn't came on exact 4.2volts..its new just 4 I've used it and charged why??
everything in this video is great basic information, but I would add that measuring internal resistance is useless unless you are fully charged and the "acceptable" resistance depends on the mah of the pack. larger packs have lower resistance, smaller packs have higher.
He said it’s just informative. Also each charger gives you slightly different numbers. It’s just to give you an idea of state if the battery. But yes you are correct ohms have to be calculated and to have correct number there are lots of factors to consider 👍🏻
Well I learned something new... The part about lowering the maximum charge to increase the battery life. I don’t know if I can program my charger to stop at 4.1 per cell, it charges to 4.2 by default.
Hi, i have a 1300 mah battery and it is rated 30 C. Which means it can provide 39 A of continuous current. But i am using a 50 A esc and my brushless motor only draws 17 Amps maximum. Am i safe to use this setup? and as the esc has higher amp, will it draw 50a from the battery or will it only draw how much current the motor needs (Which is 17A)?
No, but this video is an aileron/elevator mix. It's the same concept, just replace the references to aileron with rudder: th-cam.com/video/U0FmXP1VSmc/w-d-xo.html
I'm curious about internal resistance...doesn't that number depend on the capacity. I have a much high resistance on small capacity batteries vs large or when I parallel charge...so I'm just curious if that "7" is for 4000mah 5s only.
@@RCVideoReviews Gotcha, I guess I am getting this idea confused with resistance in a parallel circuit. Thanks for answering that and all the videos that keep me in the air.
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Absolutely spot on. I land my lipos around 3,6 - 3,7V and my even 7 years old batteries are still holding strong. Thank you for sharing your knowledge and making easy to understand video for people who are just learning about lipos. 👍🏻
Thanks for sharing.
Thank you so much for the info! I'm fairly new to the hobby, and get cross eyed looking at all the battery options out there. This helps tremendously!
Glad to help.
Great information even for veterans.
Ive been in and out of rc for awhile and tend to forget some of this. This was a great refresher.
Awesome. Glad it helped.
Thanks for this. Just getting back into the hobby after 20 years off. Flew gliders off the cliffs in Palos Verdes. CA years (ages) ago, everything from floaters to jet style gliders, the only batteries I had to worry about was for the receiver and servos, and I could even just used ni-cad, or even alkaline, AA's, but just got a Valiant recently, got the batteries, the chargers, the checkers, etc., etc., but just not the knowledge of how/what/why to do with them.
Got a better understanding now. Thanks.
Glad to help.
great video I have the same charger as the one in the vid and it's a pretty good charger for the price, highly recommended. I think you should do a few tutorials from beginning to the end about making an fpv wing (including all RC link stuff)
Thanks for the comment. I have some equipment inbound, so maybe I can work something out. Appreciate the feedback.
Nice video reminder of how to safely store Lipo batteries - there a lot of misconceptions about lipo batteries - common sense and knowing the proper maintenance of these.
It's unbelievable how much bad information is out there on these batteries.
Great information, I have my power supplies for storage mode at 3.8 V thanks great video. ⭐️⭐️⭐️⭐️⭐️
That'll do it. I started using 3.75v when I realized all the manufacturers send them to me that way.
Thanks a lot! that were some detailed and well structured basics for a noob!
Glad it was helpful!
Nice and concise video, thanks a lot. Btw your intro/outro is the same as Chef John's from Food Wishes haha.
You're welcome.
Hi!
I have been in a debate with another member of my club over the safety/advisability of storing either single cell (1s) or multicell batteries in groups held together by charging cables that maintain parallel connections between batteries.
I am rarely able to charge my batteries before I get home from a flying outing, but I conscientiously check and storage charge my batteries when I get home. During the period between use and checking/charging, I like to connect my used batteries to the unused or randomly available batteries of the same type.
This keeps batteries that get discharged below 3.7v per cell from staying that way for more than 10 minutes after being used.
I am aware that charging batteries that are of a different type (NM Hydride, Lipo=Lithium polymer, Li Ion, LiFePO4) or "C" rating can be dangerous, but I contend that storing my batteries of the same type in parallel groups gently recharges batteries in deep discharge by the other batteries in the group, and that this practice is safer than waiting till I get home to test and possibly dispose batteries in deep discharge (
I don't like connecting cells in parallel with substantially different voltages, but I don't have any objective evidence to say what is acceptable vs unacceptable delta. Over time cells in parallel will balance each other. C-rating is immaterial. Chemistry is immaterial as long as you have like voltages. i.e. If you have one cell @ 2v and a lipo @ 3.6v you might get sparks when you connect them and the lipo may wind up damaged as it feeds 3.6v to the lower 2v to balance at 2.8v.
Very good overview and details for safety and cell life. The advice for maximum charge voltage vs cell cycle life is great. Now I want to learn more about the useful capacity with that tradeoff to decide how much field time is compromised. I suspect that much of the degradation of cell life with a full charge corresponds to the time period (and temp.) in that state. For example, if I conservatively charge to 4.2V and soon afterward apply the battery, what's the tradeoff vs a 4.1V peak charge?
Tradeoff for peak as you've identified is always time. According to an MIT paper I read on LIPO testing the lifetime of a LIPO can be extended something crazy like 75% just by limiting peak to 4.18v/c. I would challenge you to do an experiment and fly 6 packs at 4.18 and 6 packs at 4.20. Use a low voltage sag logic setup (like this: th-cam.com/video/Q5s7zB0NDCQ/w-d-xo.html) record your results and see for yourself the actual difference. In fact---this might make a good video.
As an electrical engineer, I agree with everything you said. Good presentation! What LiPo charger are you using?
Appreciate the feedback. I use an iCharger 306B as the main desktop charger. The charger in this video is a Toolkit M8S. I love that little charger. Here's an affiliate link if you want to check one out. www.banggood.com/custlink/KKKRJlHuKW
I apreciate the link.i am tired of the I max or b6.They constantly are inconsistent,with under or over charging for me.I am frustrated with the 20 differant spektrum options every other week.I just want an economical,reliable easy to use charger.
@@seanpettit6410 ISDT makes some really good products. They aren't too expensive, but they're not bargain basement either. I don't understand how they sell the Toolkit M8S for that price and it does handle 400w. I tested it.
The toolkit ms8 is out of stock thru your link.if u have any links on the isdt please post thx.
Thanks man!
You didn’t include a “recommended” recharge amperage. Some batteries actually have markings for MAX recharge rates.
I tend to stay with 1C to no more than 2C, when recharging.
I used to charge Zippy compacts at 5c which was a safe charge level according to their own labeling. I stopped that years ago though. Just 1c to charge for me.
@@RCVideoReviews Newbie here...30C rated battery charge at 3A?
@@brxtmp106 the C rating very often present on battery case is for discharge rate. I hope you have not tried charing at 30C 👀
Exactly what I needed to know! Thank you! Do you have a recommendation for a LiPo storage container and/or charging bag? Would they really contain a potential fire?
Funny you ask :). th-cam.com/video/4Ajz9t3CYbc/w-d-xo.html
Thank you John for your informative and honest videos. May I have a clarification on how to charge 1S whoop batteries on a parallel board? I have seen a mixture of hacks on TH-cam but not sure which is the best practice.
Rules for parallel charging are rather simple: Same voltage with +/- 0.05v to start. You can use the combined amperage for the charge. i.e. If each battery can take 1a and you charge 6 batteries at a time, you can use 6a.
That's very nice information sir..I have a question..why my new 4s lipo. Even I full charge 16.8. when I checked at cell meter every cell is just 4.1plus it didn't came on exact 4.2volts..its new just 4 I've used it and charged why??
Calibrate your gear.
AWESOME video! THANK YOU!
You're welcome!
everything in this video is great basic information, but I would add that measuring internal resistance is useless unless you are fully charged and the "acceptable" resistance depends on the mah of the pack. larger packs have lower resistance, smaller packs have higher.
He said it’s just informative. Also each charger gives you slightly different numbers. It’s just to give you an idea of state if the battery. But yes you are correct ohms have to be calculated and to have correct number there are lots of factors to consider 👍🏻
Thank you for such an awesome video 👏🏻👏🏻👏🏻
Glad you enjoyed it! Thanks for watching.
@@RCVideoReviews
I’m looking forward to :
Lipo 201 - Parallel Charging, Charging Rate, Disposing/Discharging, Safely Storing Lipos, etc, etc 😀
@@q1v1 I've oddly covered pretty much all of this, but I think putting it into a 201 video would be a great idea.
Thanks!
You're welcome.
Well I learned something new... The part about lowering the maximum charge to increase the battery life. I don’t know if I can program my charger to stop at 4.1 per cell, it charges to 4.2 by default.
Chargers tend to have different options. I have been able to lower mine to 4.15v/c
I used to run over 2 hours brand new. Now I barely get 30 minutes on a full charge. Should I throw it away?
It doesn't sound healthy.
Hello! Does more mah give you more power or is it strictly run time?
Just runtime.
Hi, i have a 1300 mah battery and it is rated 30 C. Which means it can provide 39 A of continuous current. But i am using a 50 A esc and my brushless motor only draws 17 Amps maximum. Am i safe to use this setup? and as the esc has higher amp, will it draw 50a from the battery or will it only draw how much current the motor needs (Which is 17A)?
ESC's are not the load. Load comes from the motor. So your setup should be fine if the motor tops out at 17a.
@@RCVideoReviews Thank you very much
Do you have a video on v-tail mixes
No, but this video is an aileron/elevator mix. It's the same concept, just replace the references to aileron with rudder: th-cam.com/video/U0FmXP1VSmc/w-d-xo.html
+1👍 always great for a refresher 💪
Thanks for the visit
I'm curious about internal resistance...doesn't that number depend on the capacity. I have a much high resistance on small capacity batteries vs large or when I parallel charge...so I'm just curious if that "7" is for 4000mah 5s only.
IR doesn't know anything about MAH. I use 7mΩ for every pack.
@@RCVideoReviews Gotcha, I guess I am getting this idea confused with resistance in a parallel circuit. Thanks for answering that and all the videos that keep me in the air.
@@txkflier awesome explanation 👏