Community verified— Verified from trusted watchmaker & collector sources
What Battery Does Tissot PRX Quartz 35mm Use?
Battery
SR621SW
Silver Oxide Low Drain 1.55V
- Battery life
- ≈ 36–44 months
- Voltage
- 3V
- Caliber
- ETA F05.115
Where to buy SR621SW
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Important: Smaller 35mm version uses a different battery than the 40mm — SR621SW vs SR920SW. Do not confuse.
Compatible SR621SW Batteries
Renata 364Maxell SR621SWSony MurataEnergizer 364Varta V364
All listed brands are direct equivalents. Always use Silver Oxide Low Drain 1.55V chemistry.
Other Names for SR621SW
SR621SW364D364V364AG1
See full cross-reference table How to Replace the Battery in Tissot PRX Quartz 35mm
- Professional replacement recommended to maintain water resistance
- Use a snap-off case back opener
- Use Low Drain (SW) type only
- Check EOL indicator after replacement: second hand every 4 seconds = low battery
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.