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This is the battery board for Williams pinball machines Systems 3-6. It is a direct replacement and requires no modification to your original board. It includes an additional blocking diode in the event the one on the board fails. Some of the glass diodes used on Williams pinball machines have been known to short. When this happens, the game will start to charge the battery which can result in overheating or fire. Patent pending.
Remember, your purchase helps a great cause, $2 from every battery board purchased from noquartersarcade.com goes to Project Pinball!
This board will work on the following games.