Move the batteries off the board

Relocating the batteries to a remote holder elsewhere in the head keeps future leaks off the electronics. Remote battery kits include holders, a blocking diode and wiring; many shops also convert NiCad-equipped games to alkaline cells this way.

Systems

• Williams System 3
• Williams System 4
• Williams System 6 / 6A
• Williams System 7
• Williams System 9
• Williams System 11
• Williams System 11A
• Williams System 11B
• Williams System 11C
• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95
• Bally MPU AS-2518-17
• Bally MPU AS-2518-35
• Stern MPU-100
• Stern MPU-200
• Bally 6803
• Gottlieb System 1
• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B
• Gottlieb System 3
• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b
• Capcom

Related tips

• Move the CPU batteries off the board
• Changing batteries without losing settings
• High scores, replay levels or free play keep resetting
• Judging battery corrosion damage
• A shorted D2 tries to charge the batteries
• The batteries also power the U9 ASIC clock
• Change the CPU backup batteries yearly, with the game on
• Using a memory backup capacitor instead of batteries

Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)