362 Battery Equivalent
362
Common mid-size watch battery
362 and SR721SW are exactly the same battery. A popular mid-size silver oxide watch battery found in many quartz watches from Seiko, Citizen, Casio, and fashion brands. The 361 (SR721W) is the high-drain version — modern multi-drain 362 cells replace both.
Voltage
1.55V
Chemistry
Silver Oxide
Dimensions
7.9mm × 2.1mm
Typical battery life
2–4 years
All 362 equivalents
| Battery code | Type | Compatible? |
|---|---|---|
| 362 | Silver oxide | ✓ Direct replacement |
| SR721SW | Silver oxide | ✓ Direct replacement (IEC code) |
| SR58 | Silver oxide | ✓ Direct replacement |
| D362 | Silver oxide | ✓ Direct replacement (Duracell) |
| V362 | Silver oxide | ✓ Direct replacement (Varta) |
| SB-AK / SB-DK | Silver oxide | ✓ Direct replacement (Seiko) |
| 280-29 | Silver oxide | ✓ Direct replacement (Citizen) |
| 19 | Silver oxide | ✓ Direct replacement (Renata) |
| 361 / SR721W | Silver oxide | ✓ High-drain version — modern 362 replaces both |
| SG11 / AG11 | Silver oxide | ✓ Direct replacement |
| LR721 | Alkaline | ⚠ Same size — use silver oxide for watches |
Silver oxide vs alkaline — does it matter?
Always use silver oxide in watches — not alkaline. Alkaline equivalents have a declining voltage curve — your watch will run slower as the battery drains. Silver oxide maintains a steady 1.55V until nearly depleted, giving accurate timekeeping throughout its life.
Watches that use 362
Found in many Seiko, Citizen, Casio, Pulsar, and Lorus quartz watches, as well as fashion watches from various brands. Check the caseback or existing battery code to confirm.
Always check the code on your existing battery or the caseback of your watch. If unsure, a jeweller can confirm the correct size without replacing the battery.
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