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| Part Number | SR721 | SR726 | SR721W | SR621 |
|---|---|---|---|---|
| Manufacturer | Murata Electronics | Murata Electronics | Seiko Instruments | Murata Electronics |
| Product Status | Active | Active | Active | Active |
| Battery Chemistry | Silver Oxide | Silver Oxide | Silver Oxide | Silver Oxide |
| Battery Cell Size | Coin, 7.9mm | Coin, 7.9mm | Coin, 7.9mm | Coin, 6.8mm |
| Voltage - Rated | 1.55 V | 1.55 V | 1.55 V | 1.55 V |
| Capacity | 29mAh | 35mAh | 26mAh | 20mAh |
| Size / Dimension | 0.31" Dia x 0.08" H (7.9mm x 2.1mm) | 0.31" Dia x 0.10" H (7.9mm x 2.6mm) | 0.31" Dia x 0.08" H (7.9mm x 2.0mm) | 0.27" Dia x 0.08" H (6.8mm x 2.2mm) |
| Termination Style | Requires Holder | Requires Holder | Requires Holder | Requires Holder |