| Part Number | SR621 | SR721 |
|---|---|---|
| Manufacturer | Murata Electronics | Murata Electronics |
| Category | Batteries Non-Rechargeable (Primary) | Batteries Non-Rechargeable (Primary) |
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| Product Status | Active | Active |
| Battery Chemistry | Silver Oxide | Silver Oxide |
| Battery Cell Size | Coin, 6.8mm | Coin, 7.9mm |
| Voltage - Rated | 1.55 V | 1.55 V |
| Capacity | 20mAh | 29mAh |
| Size / Dimension | 0.27" Dia x 0.08" H (6.8mm x 2.2mm) | 0.31" Dia x 0.08" H (7.9mm x 2.1mm) |
| Termination Style | Requires Holder | Requires Holder |