Official— Manufacturer documentation verified
What Battery Does Casio G-Shock GA-100 Use?
Battery
CR1220
Lithium 3V
- Battery life
- ≈ ~2 years
- Voltage
- 3V
- Caliber
- 5081
Where to buy CR1220
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Compatible CR1220 Batteries
PanasonicMaxellEnergizerSony MurataVarta
All listed brands are direct equivalents. Always use Lithium 3V chemistry.
Other Names for CR1220
CR1220DL1220BR1220ECR1220SB-T13
See full cross-reference table How to Replace the Battery in Casio G-Shock GA-100
- Use a case back opener tool — GA-100 has a screw-off case back
- Remove the case back carefully
- Remove the old CR1220 battery from the holder
- Insert new CR1220 battery positive side up
- Press the AC contact point briefly with a non-conductive tool to reset
- Re-attach the case back
Related Watch Models
Data verification
Battery information is based on manufacturer documentation where available and community-verified sources. If you notice an error or have official documentation for this model, please contact us to help improve this database.