Official— Manufacturer documentation verified
What Battery Does Casio G-Shock GA-2100 Use?
Battery
SR726W × 2
Silver Oxide High Drain 1.55V — 2 batteries
- Battery life
- ≈ ~3 years
- Voltage
- 3V
- Caliber
- 5611
Where to buy SR726W × 2
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Important: Requires two SR726W (396) batteries — not one. Use High Drain (W) type only.
Compatible SR726W × 2 Batteries
RenataMaxellSony MurataVartaEnergizer
All listed brands are direct equivalents. Always use Silver Oxide High Drain 1.55V — 2 batteries chemistry.
Other Names for SR726W × 2
SR726W396AG2LR726
See full cross-reference table How to Replace the Battery in Casio G-Shock GA-2100
- Important: this watch requires TWO SR726W batteries
- Use a case back opener — GA-2100 has a screw-off back
- Remove both old batteries and note their positions
- Install two new SR726W batteries positive side up
- Press AC reset point briefly with a pin
- Replace 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.