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LR621 battery equivalent and size
LR621: 1.5 V alkaline button cell, 6.8 mm × 2.15 mm, about 13 mAh (20 mWh). Same battery: AG1, 164. Also fits: SR621SW.
1.5 Vvoltage
6.8 mmdiameter, 0.268 in
2.15 mmthick, 0.085 in
≈ 13 mAhcapacity
LR621: what to know
- AG1 and 164 are the same cell; the silver oxide 364 (SR621SW) is the better choice for watches.
LR621 equivalents
AG1164
- 364: silver
Can I use another battery instead of an LR621?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| SR621SW | 6.8 mm × 2.15 mm | 1.55 V | Yes | Same size; silver oxide lasts longer (an upgrade). |
| SR616SW | 6.8 mm × 1.65 mm | 1.55 V | Short-term | 0.5 mm thinner: may sit loose; fine short-term. |
| LR626 | 6.8 mm × 2.6 mm | 1.5 V | No | 0.45 mm thicker: will not fit. |
| SR626SW | 6.8 mm × 2.6 mm | 1.55 V | No | 0.45 mm thicker: will not fit. |
What uses an LR621 battery?
- Toys
- Small LED lights
- Novelty watches
Silver oxide version: SR621SW, about 23 mAh vs 13 mAh, steadier voltage: better for watches, calipers and thermometers.