Since it had been a while since I checked on all the vehicles I thought I would check charge on the car and other projects. I turned on the Mazda and... NOTHING, not a good feeling.
The batteries were all at less than 1 volt, I assumed I had destroyed the battery pack.
I put the plugged in the charger and the voltage came up to 2.5v a cell quickly.
I charged for 10 hours at about 8 amps, so far the voltages are very close and holding, I have yet to take it for a test drive and check the capacity.
I wanted to bottom balance the pack, but not like THIS! I am not holding much faith that the pack is good as the voltage is never supposed to go under 2.5v a cell.
The lesson learned, even though I had good intentions on checking the charge, I should have disconnected the pack.
I guess I will find out if you can fully deplete a Lithium battery and bring it back to life.