Preserving Game Boy Cartridge Batteries

Preserving Game Boy Cartridge Batteries

Many classic Game Boy, Game Boy Color, and Game Boy Advance games contain a small battery inside the cartridge that powers the save function. These batteries typically last 15-20 years, which means many original cartridges from the 1990s and early 2000s are now at risk of losing their ability to save games. This guide will help you understand, maintain, and replace these crucial components.

Why Game Boy Cartridges Have Batteries

Unlike modern games that save data to flash memory, many older Game Boy games used Static RAM (SRAM) to store save data. SRAM requires constant power to maintain its data, which is why a small battery is included in the cartridge. When this battery dies, the game can still be played, but it can no longer save progress.

Identifying Games with Batteries

Not all Game Boy games contain batteries. Here's how to identify which ones do:

Games that typically contain batteries:

• RPGs like Pokémon, Final Fantasy, and Dragon Warrior
• Games with level progression or high score saving
• Games with the "Continue" option on the title screen

Games that typically don't contain batteries:

• Simple puzzle games
• Many platformers
• Games that use passwords instead of saves

If you're unsure, you can always open the cartridge to check (more on that below).

Signs of a Dying Battery

• The game no longer saves progress
• Saved games disappear randomly
• The game displays "Save data corrupted" or similar messages
• The game freezes when trying to save

Tools Needed for Battery Replacement

• Game Bit screwdriver (3.8mm for Game Boy and Game Boy Color, 3.3mm for Game Boy Advance)
• CR2025 or CR2032 coin cell batteries (check which type your game uses)
• Soldering iron and solder
• Solder wick or desoldering pump (for removing old solder)
• Electrical tape or battery holders
• Small Phillips screwdriver
• Tweezers

Battery Replacement Process

1. Preparation

• Work in a well-ventilated area
• Have all tools ready before opening the cartridge
• Consider taking photos during disassembly for reference

2. Opening the Cartridge

• Use the Game Bit screwdriver to remove the screw(s) on the back of the cartridge
• Carefully separate the two halves of the cartridge shell
• Remove the circuit board, being careful not to touch the contacts

3. Removing the Old Battery

• Identify the battery on the circuit board (round metal disc)
• Note the orientation and connection points
• If soldered, use the soldering iron and solder wick to remove the old battery
• If using a battery holder, simply remove the old battery

4. Installing the New Battery

• Place the new battery in the same orientation as the old one
• If soldering, attach the battery tabs to the same points on the board
• If using a battery holder, insert the new battery
• Ensure connections are secure

5. Reassembly

• Place the circuit board back in the cartridge shell
• Close the shell and replace the screw(s)
• Test the game to ensure saving works properly

Alternative: Battery Holders

Instead of soldering a new battery directly to the board, many collectors prefer to install battery holders. These allow for easier future replacements without soldering. Pre-made battery holders for Game Boy cartridges are available from retro gaming suppliers.

Preventative Measures

• Keep games in a cool, dry environment
• Remove games from consoles when not in use
• Consider backing up save data using devices like the GB Operator or EverDrive

Ethical Considerations

When replacing batteries in rare or valuable games, it's important to preserve the original condition as much as possible. Some collectors prefer to have professional modders perform battery replacements on high-value games to maintain their collectible status.

By understanding and maintaining the batteries in your Game Boy cartridges, you can ensure that these classic games remain playable and your save data stays intact for years to come.