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Update: I have gone through discharge/charge cycle with the battery that I disassembled, and everything looks good. The voltage after charging was 54.28 V. This would equate to 4.17V per cell. Since I likely did no charging with my efforts above, this would infer that the samsung cells lost very...

harryS, I understand about the challenges of overcharging via the output port, and I measured cell voltage and all were at 4.13V. The max voltage is 4.2, so my charging through the output ports did no harm from what I can tell. AguassissiM, Here is a photo inside the battery, but I only took 3...

UPDATE: I discovered the problem. The battery was in "lock" mode. I turned the key and the voltage was back to normal. False alarm, but I got to totally disassemble the battery to see the inner workings and configuration. Fun project ;)

I left a spare Radrover battery sit for a long time and when I went to charge it, the charger did not recognize it. I measured only 20V at the output terminals that connect the battery to the motor. Since this is a 48 V battery, I figured it was below the minimum voltage level that the charger...