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Old 09-10-2007, 09:33 AM   #1
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Default Did I damage my batteries?

I have the Duratrax IntelliPeak Twin-Pulse charger (link). It can do 3.5A charges or 1A charges for receiver batteries. I didn't know the 1A charge was for 8.4v transmitter packs. My friend told me to try charging my 6 cell stick batteries at 1A since it heats the batteries up less and will make them last longer. It took about 5-6 hours but it peaked my discharged 6 cell 3000mAh NiMH packs.

Did I damage my batteries by running them on the 1A 8.4v charge, or is the charger smart enough to only charge them to 7.4v? I didn't know any better and blindly followed his advice, and now I am afraid I messed up all my stick packs.
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Old 09-10-2007, 09:49 AM   #2
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Originally Posted by M-Technic View Post
I have the Duratrax IntelliPeak Twin-Pulse charger (link). It can do 3.5A charges or 1A charges for receiver batteries. I didn't know the 1A charge was for 8.4v transmitter packs. My friend told me to try charging my 6 cell stick batteries at 1A since it heats the batteries up less and will make them last longer. It took about 5-6 hours but it peaked my discharged 6 cell 3000mAh NiMH packs.

Did I damage my batteries by running them on the 1A 8.4v charge, or is the charger smart enough to only charge them to 7.4v? I didn't know any better and blindly followed his advice, and now I am afraid I messed up all my stick packs.
It's doubtful that peaking your batteries at 1 amp will do any damage to your packs. The lower amp level is to keep from frying cells that weren't designed to take a higher amp rate charge. If a charger is a true peak detect charger, it would detect the peak of the pack no matter what. If the peak detect was specifically set-up for 8 cells as opposed to 6, it just means that when you peak the 6 cell pack, the pack will drop a few more millivolts due to it being programmed for a higher cell count (I.E. if a charger is programed to detect 3/mv per cell voltage drop for 8 cells for a total of 24 mv drop, and you put a 6 cell pack on there that would normally have been programmed for a 3 mv drop at a total of 18 mv, the pack will get a little warmer while it is waiting for the pack to reach that drop-off in voltage). Because a battery pack will only accept only so much charge, when it reaches it's limit, the power to charge will only turn into heat, and the overall voltage of the pack will start to drop because of the heat. This is the peak. To prevent false peak detects, chargers are programed to stop charging when the drop-off reaches a certain level...
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Old 09-10-2007, 11:58 AM   #3
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Wink I doubt any damage

I agree with the previous poster, I doubt your pack are damaged. They'll probably run a little flat because you charged them at only 1 amp. Just run them and after a couple of runs and re-charging at 3.5 amps, they should be just fine. In the future charge at 3.5 amps only, they should be warm not hot after peaking.
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Old 09-10-2007, 12:00 PM   #4
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Thanks a lot for the info guys *wipes sweat from brows*. That gives me some peace of mind. I'll run them down again and then recharge at 3.5A. Thanks again!
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