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!