I have a Radpower battery that fits the 2016/2017 RadRover, RadWagon, and RadCity. It's the 48V 11.6Ah Panasonic Lithium-Ion battery pack. It discharges fine but wont charge. I accidentally touched the charging point on the battery with the key and it fired a few sparks out (brilliant move!). I'm guessing I damaged the charge port on the battery. I'd like to keep this out of the landfill. If you are building a battery pack or want to have a go at repairing it you can have it. You just have to promise that you will dispose of it properly if it doesn't work out and you have to pick it up in Fremont, CA. If no one is interested I'm taking it to the hazardous waste disposal.