Leakage from cell to frame can infuse high voltage to frame, not good if you are removing the pack lol (reminds me of insight sticks on the honda, remove the mylar and the outside metal case of the D CELL are HOT, place them back in the non conductive case and then drive around, a reaction slowly occurs and the non conductive case becomes conductive, and your car burns to the ground one night parked outside) Stall test with graph to find bad cells using techstream Corrosion in sensor leads may cause problems false indications Initialize the HV pack using techstream, dont know if this works or is available, I'm gonna check my copy https://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1028&context=auto_pres