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Does Your GBC Game Not Save? Do You Want It To Save?
If Yes, Read This.

IF YOU DO THIS, I AM NOT RESPONSIBLE FOR DAMAGE!

What You Need:
2025 Or 2032 Battery (2032 Is Longer Lasting)
Tool To Open Screw
Soldering Iron
Soldier
Multimeter(OPTIONAL)
Wire
Electrical Tape

Step 1: Open the Cartridge

Use Pliers,Screwdriver,Tweezers Or Anything That Will Open The Tamper-Proof Screw

Then Slide The Cartridge Open

Step 2: Test the Battery

BEFORE You De-Soldier The Battery, Test It With A Multimeter. Full Battery Should Be 3.0 Volts

IF BATTERY IS GOOD, DO NOT CONTINUE
NEXT STEP IS RISKY!

Step 3: De-Soldier the Battery

Just De-Soldier The 2 Points That Are Marked In The Image

Should End Up Like The Image

Step 4: Soldier Wires

Soldier 2 wires to the points shown in the image
Attach Piece Of Tape As Shown

READ THE IMAGE NOTES (yellow boxes)

Careful! Soldering Irons Are Hot!

Step 5: Insert and Tape Battery

NEGATIVE SIDE UP

Step 6: Close Up

If It Doesn't Fit,  Try Again

Slide the cover back on

If You Want, Reinstall Screw
It always seems to be Silver, I've got two copys that I have replaced to battery and they're flat again. I'll stick with Gold ;) A good method if you've got the coin cells lying about, I'd still be tempted to solder some tabs to the battery just in case though.
You Cant Soldier A Battery
You can! haha In electronics I used to solder together AAs to make battery packs. Takes a bit of practice but it's pretty simple when you've learned how
you should make an instructable, that sounds like something worth knowing.
I've done it - but without a heatsink on the battery you risk a lithium fire :S
Oh, Sorry
argh, Pokemon yellow uses cr-1616, I CAN'T FIND THEM ANYWHERE!!
try ordering online
Also, it's not hard to find tabbed 2032 batteries, and these you can directly solder back to the cartridge. Good ible!
I Realized That, I rushed a little and had lack of resources

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