![Preservation project. I'm upgrading old NES and SNES cartridges with better eprom batteries and battery holders. You'll lose your save games with the mod, but get years more use from old games. Preservation project. I'm upgrading old NES and SNES cartridges with better eprom batteries and battery holders. You'll lose your save games with the mod, but get years more use from old games.](https://preview.redd.it/7x127m1x4sry.jpg?width=640&crop=smart&auto=webp&s=77af6ff34ac4da1cd31369c9641e9f64a6558d46)
Preservation project. I'm upgrading old NES and SNES cartridges with better eprom batteries and battery holders. You'll lose your save games with the mod, but get years more use from old games.
![Amazon.com: NES/SNES Save Battery Replacement Kit (includes installation instructions) : Video Games Amazon.com: NES/SNES Save Battery Replacement Kit (includes installation instructions) : Video Games](https://m.media-amazon.com/images/I/21tuxYdgzJL.jpg)
Amazon.com: NES/SNES Save Battery Replacement Kit (includes installation instructions) : Video Games
![Wiresmith CR2032 Tabbed 3V Replacement Coin Cell Save Battery for Classic Nintendo Nes Snes N64 Sega Genesis Game Cartridge - Walmart.com Wiresmith CR2032 Tabbed 3V Replacement Coin Cell Save Battery for Classic Nintendo Nes Snes N64 Sega Genesis Game Cartridge - Walmart.com](https://i5.walmartimages.com/asr/33fc6d31-1f55-4c9d-a9e4-69ebc6f10870_1.71cca803921fb53e982899b37aed1e2c.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Wiresmith CR2032 Tabbed 3V Replacement Coin Cell Save Battery for Classic Nintendo Nes Snes N64 Sega Genesis Game Cartridge - Walmart.com
Will an NES or SNES game that wasn't used much continue to save reliably today? Or does it not matter since the batteries are so old now? I don't want to be
![Purple Shell 110 In 1 Snes Game Battery Save Card Video Game Cartridge Snes Console Game Card/ - Buy Snes Game Card Everdrive Snes,Hacked Snes Classic,Super Mario Snes Games Product on Alibaba.com Purple Shell 110 In 1 Snes Game Battery Save Card Video Game Cartridge Snes Console Game Card/ - Buy Snes Game Card Everdrive Snes,Hacked Snes Classic,Super Mario Snes Games Product on Alibaba.com](http://sc04.alicdn.com/kf/H5fb827271f4f4689a6002d593997940fL.jpg)