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| Part Number | SR521SW |
| Datasheet | SR521SW datasheet |
| Description | BATTERY SLVR OX 1.55V COIN 5.8MM |
| Manufacturer | Seiko Instruments |
| Series | - |
| Part Status | Active |
| Battery Chemistry | Silver Oxide |
| Battery Cell Size | Coin, 5.8mm |
| Voltage - Rated | 1.55V |
| Capacity | 16mAh |
| Size / Dimension | 0.23" Dia x 0.08" H (5.8mm x 2.0mm) |
| Termination Style | Requires Holder |