Connecting batteries to fight the sag

Check the individual p group voltages by reading the pins on the balance plug with a multimeter.

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So yeah I checked the voltages of the p groups and uhh they decreased incrementally down to about 2 volts. Wtf does that mean? Would one bad group drain its neighbours in such a fashion? Could it be the bms? That just seems like a strange thing to find… thanks for th tip though, I just cant translate the results