Battery Replacement - Bally Pinball MPU Board 1977-1985 - YouTube
Finding and Replacing the Batteries -
PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
Standard Williams/Bally WPC Battery Holder
5881-09021-00 - Standard Williams / Bally battery holder with through hole circuit board mount terminals.
Pinball Classics - No Solder Remote Battery Holder
Building a remote battery pack for pinball | EnterYourInitials
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Pinball Life: Premium Remote Battery Holder for Williams/Bally WPC & WPC-95 Machines
Bally 6803 Replacing the battery with a 2032 coin cell - "Escape from the Lost World" - YouTube
MPU 100/200 battery board for Bally/Stern games – No Quarters Arcade
MPU089 Williams Pinball Machine WPC89 MPU Board Rottendog – Little Shop Of Games
Bally Pinball MPU Corrosion Parts Repair COMBO KIT w/ Remote Battery Holder | eBay
MPU 100/200 battery board for Bally/Stern games – No Quarters Arcade
MPU SETUP INO - Pinball Electronics from barakandl
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Big Daddy - Boards
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part one
