So, here's a thing, this happened to me today:
I have 4 Lithium-Ion Iron Phosphate 26650's from A123systems wired in series-parallel and the bottom "half" of the cells went dead and the top "half" didn't.
Anyone have any ideas?
(the wire in between is for the charging circuit)(the batteries were not charging when this happened but they were wired up to my microcontroller and servos)
These voltages were measured while still in the circuit and the "0 volts" was actually more like 0.8 volts.
Ideas would be helpful.