7.4v 8000mah balloning (slightly)
I've had this pack in my Tamiya TRF415 for about 4 months. It's always been run with a Mamba Max 7700 with lipo cutoff at 6v. I haven't run the car for a few weeks and when I went to take it out tonight I noticed that the top cell was slightly puffing in the middle. I checked the voltage and it's over 8v. Last time I put it away it had more than half a charge left in it. (I think only once did I ever hit voltage cutoff, it lasted that long!)
My questions are: Is the pack ruined? And if so, what caused it? I've always done everything right when it comes to lipo care so this is really buggin me! Also, if only one cell is ruined, can I save the remaining cells to make a lower mah pack?
BTW, it's a great pack at a great price!
PS. I use an MRC 989 and charge the pack at 8A.