Replacing Save Batteries in Retro Games: A Step-by-Step Guide

I lost my Pokémon Red save file when I was 12. The battery died, and I didn't know you could replace it. All those hours, all those Pokémon, gone. I learned the hard way that save batteries don't last forever.

Now, I replace batteries proactively. It's not hard, but it requires some basic soldering skills. If you're not comfortable with that, you can find someone to do it for you. But if you want to learn, here's how.

Why Batteries Die

Most retro games use CR2032 coin cell batteries for save data. These batteries typically last 15-20 years, but they will die eventually. When they die, your saves are gone forever.

Signs your battery is dying:

• Save file won't load
• Game asks you to set the time/date repeatedly
• Save file disappears
• Game won't save at all

If you see these signs, replace the battery ASAP. Your saves might already be gone, but you can prevent future loss.

Games That Use Batteries

Common battery-using games:

• Game Boy/Color/Advance: Most Pokémon games, Zelda games, many RPGs
• SNES: Many RPGs, some action games
• N64: Some games use batteries (most use EEPROM)
• Genesis: Some RPGs and strategy games

Not all games use batteries. Many use EEPROM or flash memory, which don't need batteries. Check online if you're not sure.

What You'll Need

Tools:

• Soldering iron (temperature-controlled recommended)
• Solder (lead-free or leaded, your choice)
• Desoldering braid or solder sucker
• Small screwdriver set (security bits for some systems)
• New CR2032 batteries (with tabs)
• Flux (helps with soldering)

Safety:

• Well-ventilated area
• Safety glasses
• Fire-resistant surface
• Patience (don't rush)

Step-by-Step Process

Step 1: Open the Cartridge

This varies by system:

• Game Boy: Security bit screwdriver needed
• SNES: Security bit screwdriver needed
• N64: Security bit screwdriver needed
• Genesis: Standard Phillips screwdriver

Be careful not to strip the screws. Use the right size bit, and apply steady pressure.

Step 2: Locate the Battery

The battery is usually easy to spot—it's the coin cell battery on the circuit board. It might be held in place with a battery holder (easier to replace) or soldered directly to the board (requires soldering).

Step 3: Remove the Old Battery

If it's in a holder:

• Just pop it out and put in a new one
• Easy peasy, no soldering needed

If it's soldered:

• Heat the solder joints with your iron
• Remove the old battery
• Clean the pads with desoldering braid
• This is the tricky part—be patient

Step 4: Install the New Battery

If using a holder:

• Insert new battery (positive side up)
• Make sure it's seated properly

If soldering:

• Place new battery with tabs on the pads
• Heat the pad and apply solder
• Make sure connections are solid
• Don't overheat the battery

Step 5: Test and Close

• Close the cartridge
• Test the game
• Set the time/date if needed
• Make sure saving works

Common Mistakes

I've made these mistakes, so you don't have to:

Don't:

• Overheat the battery (it can explode)
• Use the wrong battery type
• Rush the process
• Skip testing
• Forget to document when you replaced it

Do:

• Take your time
• Use the right tools
• Test thoroughly
• Label when you replaced batteries
• Practice on cheap games first

When to Replace Batteries

Proactive replacement:

• Games are 15+ years old
• Before saves are lost
• When you buy used games
• As part of collection maintenance

Reactive replacement:

• When saves stop working
• When game asks for time/date repeatedly
• When you notice issues

I replace batteries proactively on my valuable games. It's better to replace them before they die than to lose saves.

Professional Help

If you're not comfortable with soldering, that's okay. Many retro game stores offer battery replacement services. It usually costs $10-$20 per game, which is reasonable.

Some collectors prefer to do it themselves, but there's no shame in getting help. The important thing is that the batteries get replaced.

The Bottom Line

Save batteries will die. It's not a matter of if, but when. Replacing them proactively protects your saves and preserves your games.

If you're comfortable with basic soldering, it's a straightforward process. If not, find someone who can help. Your saves are worth it.

Keep your saves safe. Find games with fresh batteries or get replacement services on MainMarket.com marketplace.