Charge rate for Lipo batteries
#1
Charge rate for Lipo batteries
What amp level should I charge my batteries at? When I look at documentation, it says that a 5000mah battery rated at 1C charge rate should be charged at 5A. What is this "C" value and how do I find out what the battery can do? One my batteries it says things like 35C, does this mean it could be charged at 35 times the 1C rate described before, or is this something different?
The reason I ask is that I now have a charger capable of going up to 9 amps and am wondering if I can safely use higher amp charge rates to get a faster charge if needed.
The reason I ask is that I now have a charger capable of going up to 9 amps and am wondering if I can safely use higher amp charge rates to get a faster charge if needed.
#2
the C rating i believe is the mAh divided by 1000 which comes out in amps. the 35C rating on your battery is a discharge rate so a 5000mAh at 35C can supply 175A. You need to look at your battery closely to find the max charge rate or look on the manufacturer's site for help. Otherwise you would be safe up to 1C atleast
#4
Tech Lord
iTrader: (21)
^^^^ 1C charge rate for thet battery is 5amps. If the label says 1C stick to it manufacturer has made that recommendation for a reason - your safety and the longevity of the lipo.
Don't get the discharge rating (what the lipo is supposed to be capable of discharging) - the 35C confused with the C used in charging where you will not see anything more than 5 or 6C. You try charging a lipo at 35C you would have a exploding lipo and prob a fire on your hands.
Don't get the discharge rating (what the lipo is supposed to be capable of discharging) - the 35C confused with the C used in charging where you will not see anything more than 5 or 6C. You try charging a lipo at 35C you would have a exploding lipo and prob a fire on your hands.
#5
Super Moderator
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you didn't say what battery you have so I'm going to say stay at the 1C charge rate. However I've bought batteries that are advertised as being able to be charged at more than 1C and all the "safety crap" that comes with them says 1C so I can see how it can be confusing.
#6
Thanks for all the replies, I now understand the difference between the low C number quoted for charge (input) rate and the high C number quoted for how much current the Lipo can output in to a motor. I'll verify what each of my batteries are quoted as for charging rate and stick with 1C charging unless the manufacturer explicitly states it can be charged at a higher rate.
#7
Even if your manufacturer says you can charge higher it is a good idea to charge under it at 1C unless you are in a rush to get racing because the lipo will last longer that way
#8
Tech Master
iTrader: (22)
Don't mess around with LiPo batteries. Charge them at the the recommended rate.
I have heard from a lot of people who charge 5000mah batteries at 8.5 amps... I wouldn't. 5000 @ 5a, 3500 @ 3.5 etc..
LiPo batteries can be very explosive. Below is video footage from the security system at my race track. I'm the guy on the left flinching out of the way.
This was a 20C 2S LiPo in a safety bag. FF to 45 sec into the video. (That battery was unplugged from the charger when it did that.)
I have heard from a lot of people who charge 5000mah batteries at 8.5 amps... I wouldn't. 5000 @ 5a, 3500 @ 3.5 etc..
LiPo batteries can be very explosive. Below is video footage from the security system at my race track. I'm the guy on the left flinching out of the way.
This was a 20C 2S LiPo in a safety bag. FF to 45 sec into the video. (That battery was unplugged from the charger when it did that.)
+ YouTube Video | |
#9
Good advice, thanks, I'll stick to the 1C charging rate
#10
Tech Initiate
iTrader: (8)
Don't mess around with LiPo batteries. Charge them at the the recommended rate.
I have heard from a lot of people who charge 5000mah batteries at 8.5 amps... I wouldn't. 5000 @ 5a, 3500 @ 3.5 etc..
LiPo batteries can be very explosive. Below is video footage from the security system at my race track. I'm the guy on the left flinching out of the way.
This was a 20C 2S LiPo in a safety bag. FF to 45 sec into the video. (That battery was unplugged from the charger when it did that.)
I have heard from a lot of people who charge 5000mah batteries at 8.5 amps... I wouldn't. 5000 @ 5a, 3500 @ 3.5 etc..
LiPo batteries can be very explosive. Below is video footage from the security system at my race track. I'm the guy on the left flinching out of the way.
This was a 20C 2S LiPo in a safety bag. FF to 45 sec into the video. (That battery was unplugged from the charger when it did that.)
#12
Super Moderator
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Join Date: Nov 2008
Location: RIP 'Chopper', 4/18/13 miss you bud:(
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Your post makes me quesion your knowledge of lipo's......not flaming you
#13
balance charge
Hi all,
I have mixture of recommendation of charging LIPO battery. For me i always charge my LIPO battery with balance charge with 1C rating. Local racer will recommend not to balance charge all the time which will cause the battery to loose "punch" power. Is that true? Our local racer always do normal charge (without balance) and only do balance charge once in a full moon. That way, they claimed that it will have "more punch" of power. I need opinion from you guys of which method of charging lipo battery is the best. Thanks.
I have mixture of recommendation of charging LIPO battery. For me i always charge my LIPO battery with balance charge with 1C rating. Local racer will recommend not to balance charge all the time which will cause the battery to loose "punch" power. Is that true? Our local racer always do normal charge (without balance) and only do balance charge once in a full moon. That way, they claimed that it will have "more punch" of power. I need opinion from you guys of which method of charging lipo battery is the best. Thanks.
#14
Tech Elite
iTrader: (56)
raper
If your lipo's get hot while charging then there is something wrong with yours.Lipo should never get hot while charging.The new thunderpowers can be charged at 30 amps and run cool,but i wouldn't charge any batteries at 30 amps and most of us would be taking out a loan to buy one of those chargers.LOL.