Originally Posted by
graycenphil
Would a bad cell (or a few) cause this, but still have lots of power for a short time? I do have a voltmeter, and I put the battery on the charger this morning, wondering if a full charge might make a difference. I assume I'm loking for at least 36 volts when it is fully charged; what else should I be testing for?
Yes, a bad cell (group) or two would DEFINITELY cause the Low Voltage Cutoff. (LVC)
The voltage on a good fully charged LiFePo4 battery should read 40.8v and above..
After fully charged and run for at least a mile, the voltage
should read between 38.4 and 39.6v and should stay in that range for at least 10 miles in.
(These are all while not moving, as voltage under load will be lower.)