Quoted from acebathound:These days, a 6116 NVRAM's the way to go on Bally 6803 machines, regardless of who you buy it from. No need to turn the machine on periodically to keep a memory capacitor charged up, no worry about batteries. It may cost more up-front, but it's once and done.
Do you happen to have a link to some directions for installing NVRAM in a 6803 machine? I recently picked up an Eight Ball Champ, and I'd like to get that original rechargeable battery off of the board pronto.