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Old 03-28-2011, 12:05 AM   #1
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Default Question about a possible bad cell.

This question is more directed for MaxAmps Tech support,

I recently purchased a 4 cell race edition lipo, I have ran it approximatley 5 cycles, I have noticed one of the cells seems to discharge quicker that the other 3, I follow all the SOP on balancing, set low voltage around 3.2 per cell, tonight however I ran, and the battery died what seemed to be a bit quicker that the other cycles, when i went to charge the battery, cell 1 was at 3.13 volts while the others were significantly higher 3.83 on the remaining 3, I balance each time I charge, and every cycle thats been ran through this new pack, always cell 1 seems to die first, and its always way different than the other 3 voltage wise. I am very happy with the performace of the battery, but is it possible that one of the cells is grade b, or defective, how can I know for sure?

I use a hyperion charger, have tried multiple ESC's, still same results
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Old 04-20-2011, 11:03 PM   #2
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Smile Props to Jeremy @ MaxAmps

Well I just wanted to update this thread, Max Amps had me send back the battery, and I spoke with Jeremy there who handles the repairs, they handled my issue quickly and promptly with sending me a new pack,


Just wanted to give thanks to the Max Amps people, I was a little concerned that this issue wouldn't be handled correctly, but they exceeded my expectaions, thanks max amps
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Old 04-24-2011, 08:46 AM   #3
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Great service there. I have had 10 turnigy packs go bad and didnt even get one reply from emails i sent to them.
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Old 05-04-2011, 12:39 PM   #4
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Default

Quote:
Originally Posted by crocco6413 View Post
This question is more directed for MaxAmps Tech support,

I recently purchased a 4 cell race edition lipo, I have ran it approximatley 5 cycles, I have noticed one of the cells seems to discharge quicker that the other 3, I follow all the SOP on balancing, set low voltage around 3.2 per cell, tonight however I ran, and the battery died what seemed to be a bit quicker that the other cycles, when i went to charge the battery, cell 1 was at 3.13 volts while the others were significantly higher 3.83 on the remaining 3, I balance each time I charge, and every cycle thats been ran through this new pack, always cell 1 seems to die first, and its always way different than the other 3 voltage wise. I am very happy with the performace of the battery, but is it possible that one of the cells is grade b, or defective, how can I know for sure?

I use a hyperion charger, have tried multiple ESC's, still same results
This sounds somewhat similar to a problem I experienced with my son's 6500 5S pack. I noticed that one cell lagged behind the others just a bit. I let the pack sit over the winter and when I got it out to run this spring, one cell will now not take a full charge. Lesson here is do not let your high performance packs sit too long. Cycle once a month to keep them in condition.

Thank you Jeremy, pack is on its way. Keith.
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