Thanks....I'll check it.Use your multimeter and confirm that the battery is actually charging to 54.6 volts.It may not be!
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13 cells × 4.2v = 54.6v...3.5 × 13= 45.5....say 46 volts? Also....this must refer to resting voltage? I would assume the battery has circuitry built in to not allow going below a "damaging voltage".If using "voltage"....how low is ok? Should I not go below 47 volts? I know for lipo packs (quad racing)...I dont go below 3.5v/cell.