Official— Manufacturer documentation verified
What Battery Does Casio Edifice EF-539D Use?
Battery
SR927W
Silver Oxide High Drain 1.55V
- Battery life
- ≈ ~2 years
- Voltage
- 3V
- Caliber
- 5118
Where to buy SR927W
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Important: Chronograph model — requires High Drain (W) battery type, NOT Low Drain (SW). Using SW type may cause sluggish chronograph response.
Compatible SR927W Batteries
RenataMaxellSony MurataEnergizerVarta
All listed brands are direct equivalents. Always use Silver Oxide High Drain 1.55V chemistry.
Other Names for SR927W
SR927W399D399V399AG7
See full cross-reference table How to Replace the Battery in Casio Edifice EF-539D
- Use a case back opener for the screw-off case back
- Remove the old SR927W battery
- Insert new SR927W (High Drain W type — not SW) positive side up
- Replace the case back securely
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.