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394 battery (SR936SW)
SR936SW: 1.55 V silver oxide button cell, 9.5 mm × 3.6 mm, about 70 mAh (109 mWh). Same battery: 394, SR45. Also fits: LR936.
1.55 Vvoltage
9.5 mmdiameter, 0.374 in
3.6 mmthick, 0.142 in
≈ 70 mAhcapacity
SR936SW: what to know
- 394 is low drain and 380 high drain; at 3.6 mm it is the thickest common 9.5 mm watch cell. Alkaline twin: LR936 (AG9).
SR936SW equivalents
394SR45
- 380: high-drain SR936W
- AG9: alkaline
- LR936: alkaline
Can I use another battery instead of an SR936SW?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| LR936 | 9.5 mm × 3.6 mm | 1.5 V | Yes | Same size; alkaline is cheaper but fades sooner. |
| LR920 | 9.5 mm × 2.05 mm | 1.5 V | Short-term | 1.55 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 | Short-term | 0.9 mm thinner: may sit loose; fine short-term. |
| SR927SW | 9.5 mm × 2.7 mm | 1.55 V | Short-term | 0.9 mm thinner: may sit loose; fine short-term. |
What uses an SR936SW battery?
- Watches
- Small calculators
394 = low drain (analog watches), 380 = high drain (digital, backlights). Same 9.5 mm × 3.6 mm cell; either works in most watches.
Alkaline version: LR936 (AG9), about 50 mAh vs 70 mAh; cheaper but its voltage sags.