So this is my CPS2 battery swap article from 02.06.2009 from Pineconeattack. This is the one thing I literally do once every 5 years. If you have a lot of CPS2 boards, I strongly suggest buying the batteries in the exact quantities and hopefully you can get a price break for buying them in bulk. I hope this article will still be useful to those in need of replacing your battery. I will keep it up here for archival purpose.
I’ve been collecting arcade hardware for a few years now and I’ve learned one very important thing about this hobby: knowledge is everything and the more you know the better you can preserve your growing expensive collection. You have to keep in mind that some older arcade games have the dreaded suicide battery that kills the functionality of your board when the on board battery dies. This is a big bummer for me since some of my more favorite arcade boards have this appalling flaw and as a general rule, I tend to stay away from them BUT some of the boards are easily swappable if you know what you are doing. From my experience the easiest board to swap the battery is the CP System 2 board by Capcom.
There’s plenty of write ups on forums and websites but none of them that I could find can satisfy my fetish for illustrative step-by-step walkthroughs. So with this in mind, if any of the pictures do not make any sense, then read the paragraph associated with it, hopefully that should answer most of your questions. If you still do not understand, please leave a comment so I can amend the walkthrough for future readers.
[Please note that this walk-through is based off of Razoola’s informative guide from CPS2Shock. All credit goes to him for helping out the arcade community with his informative write ups.]
This is a simple project if you have some technical skills. This walkthrough is as simplified as I can make it so if none of this makes any sense then please DO NOT ATTEMPT. This project will void what little warranty there may still exist for your board. The moment the old battery is removed you have less than 1 hour before the ROM on the PCB will die.
Attempt at your own risk!