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What Battery Does Tissot PRX Quartz 40mm Use?
Battery
SR920SW
Silver Oxide Low Drain 1.55V
- Battery life
- ≈ 68–94 months
- Voltage
- 3V
- Caliber
- ETA F06.115
Where to buy SR920SW
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Important: EOL indicator: second hand jumping every 4 seconds means battery end-of-life. Use SW (Low Drain) type only.
Compatible SR920SW Batteries
Renata 371Maxell SR920SWSony MurataEnergizer 371Varta V371
All listed brands are direct equivalents. Always use Silver Oxide Low Drain 1.55V chemistry.
Other Names for SR920SW
SR920SW371AG6LR920D371V371
See full cross-reference table How to Replace the Battery in Tissot PRX Quartz 40mm
- Tissot recommends professional battery replacement to maintain water resistance
- If replacing yourself: use a case back opening tool (snap-off back)
- Note the exact position of the battery insulator tab before removal
- Use Low Drain (SW) battery ONLY — High Drain (W) can damage the circuit
- Renata 371 is the OEM battery used by Tissot
- After installation: if second hand jumps every 4 seconds, battery is at EOL — try a new one
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.