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Question about the voltage peak during charging

Old 07-28-2008, 02:36 PM
  #1  
mlamb01
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Default Question about the voltage peak during charging

I have several TP lipo batteries. They all peak at 12.6v according to the triton jr. charger I am using, but when the charger stops they read 12.55 or 12.54. I think when they were new, they may have read 12.59 or 12.6 after the charge. I probably have about 30 or 40 cycles on the batteries. Is this normal?
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Old 07-28-2008, 04:55 PM
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Hughes500Bob
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Yes .... it is normal for some drop off with use. How much and how fast are dependent on the rate of discharge and charge. Are you balancing?
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Old 07-28-2008, 05:00 PM
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mlamb01
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Yes, I do check the balance. I have thunder power packs, and the small thunder power balancer. I think it is tp-205 or something like that. So far, I have never had a pack show unbalanced.
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Old 07-28-2008, 05:12 PM
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Hughes500Bob
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Hot weather tends to drop them off a bit also as soon as they get into the heat. This is why you should not full charge if you are taking them out into very cold weather as they can over-voltage.

Ooops. I've got this backwards. See below correction. Thanks Charles!!!!

Last edited by Hughes500Bob; 07-28-2008 at 09:21 PM. Reason: Made correction to post!
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Old 07-28-2008, 09:05 PM
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everydayflyer
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Think you have that backwards , as in should not charge above 4.1 per cell when they are cold as they will become overcharged when the warm up. According to FMA Direct they should never be charged above 4.1 per cell if below 50F and in fact their chargers reduce the charge to this level automaticly. I disagree with the way they dio this but ......................


Charles
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Old 07-28-2008, 09:20 PM
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Hughes500Bob
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Thanks Charles for clarifying that! So if you charge it in a cold room, the voltage will increase when warmed up.
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