A friend asked me to fix his brand new electric kick scooter with an alleged battery issue. I removed the battery pack for inspection and discovered it is made from 12 D-size NiMH batteries, 10,000 mAh.
It has a medium size 3rd wire coming out of the pack and I wonder what it's for? I'd like to just hook up my hobby charger (like the one that Dave reviewed) and cycle it a few times, but not sure...