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371 battery (SR920SW)
SR920SW: 1.55 V silver oxide button cell, 9.5 mm × 2.05 mm, about 40 mAh (62 mWh). Same battery: 371, SR69. Also fits: LR920.
1.55 Vvoltage
9.5 mmdiameter, 0.374 in
2.05 mmthick, 0.081 in
≈ 40 mAhcapacity
SR920SW: what to know
- At 9.5 mm across it is common in larger men's watches; the 370 is the high-drain version for digital watches.
SR920SW equivalents
371SR69
- 370: high-drain SR920W
- AG6: alkaline
- LR920: alkaline
Can I use another battery instead of an SR920SW?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| LR920 | 9.5 mm × 2.05 mm | 1.5 V | Yes | Same size; alkaline is cheaper but fades sooner. |
| SR916SW | 9.5 mm × 1.6 mm | 1.55 V | Short-term | 0.45 mm thinner: may sit loose; fine short-term. |
| CR927 | 9.5 mm × 2.7 mm | 3 V | No | Wrong voltage: 3 V vs 1.55 V. |
| LR927 | 9.5 mm × 2.7 mm | 1.5 V | No | 0.65 mm thicker: will not fit. |
| SR927SW | 9.5 mm × 2.7 mm | 1.55 V | No | 0.65 mm thicker: will not fit. |
What uses an SR920SW battery?
- Watches
Guides: wrist watch
371 = low drain (analog watches), 370 = high drain (digital, backlights). Same 9.5 mm × 2.05 mm cell; either works in most watches.
Alkaline version: LR920 (AG6), about 30 mAh vs 40 mAh; cheaper but its voltage sags.