Official— Manufacturer documentation verified
What Battery Does Casio F-91W Use?
Battery
CR2016
Lithium 3V
- Battery life
- ≈ 7 years
- Voltage
- 3V
- Caliber
- 593
Where to buy CR2016
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Compatible CR2016 Batteries
PanasonicMaxellEnergizerSony MurataVarta
All listed brands are direct equivalents. Always use Lithium 3V chemistry.
Other Names for CR2016
CR2016DL2016ECR2016BR20165012LC
See full cross-reference table How to Replace the Battery in Casio F-91W
- Place the watch face-down on a soft cloth
- Remove the 4 screws on the case back with a JIS #000 screwdriver
- Lift the case back — note the gasket position
- Remove the old CR2016 battery (positive side up)
- Insert new CR2016 battery positive side up
- Press AC reset point with a non-conductive pin
- Replace the case back and tighten screws evenly
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.