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386 battery (SR43)
SR43: 1.55 V silver oxide button cell, 11.6 mm × 4.2 mm, about 120 mAh (186 mWh). Same battery: SR1142. Also fits: LR43.
1.55 Vvoltage
11.6 mmdiameter, 0.46 in
4.2 mmthick, 0.165 in
≈ 120 mAhcapacity
SR43: what to know
- 386 is high drain and 301 low drain; it is 1.2 mm thinner than the SR44 (357). Alkaline twin: LR43 (AG12).
SR43 equivalents
SR1142
- 386: SR43W
- 301: SR43SW
- AG12: alkaline
- LR43: alkaline
Can I use another battery instead of an SR43?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| LR43 | 11.6 mm × 4.2 mm | 1.5 V | Yes | Same size; alkaline is cheaper but fades sooner. |
| LR1130 | 11.6 mm × 3.05 mm | 1.5 V | Short-term | 1.15 mm thinner: may sit loose; fine short-term. |
| SR1130SW | 11.6 mm × 3.05 mm | 1.55 V | Short-term | 1.15 mm thinner: may sit loose; fine short-term. |
| SR1136SW | 11.6 mm × 3.6 mm | 1.55 V | Short-term | 0.6 mm thinner: may sit loose; fine short-term. |
| LR44 | 11.6 mm × 5.4 mm | 1.5 V | No | 1.2 mm thicker: will not fit. |
What uses an SR43 battery?
- Calculators
- Watches
- Medical devices
386 = low drain (analog watches), 301 = high drain (digital, backlights). Same 11.6 mm × 4.2 mm cell; either works in most watches.
Alkaline version: LR43 (AG12), about 90 mAh vs 120 mAh; cheaper but its voltage sags.