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| PartNumber | MS621FE | MS621FE FL11E | MS621FE-FL11E |
| Description | BATT LITH 3V 5.5MAH COIN 6.8MM | Coin Cell Battery Recharge Battery/Tab RTC/SRAM Backup. Lithium Coin 3V 5.5mAh Rechargeable | |
| Manufacturer | SEIKO | SEIKO | SII |
| Product Category | IC Chips | Batteries Rechargeable (Secondary) | Batteries Rechargeable (Secondary) |
| RoHS | Not Applicable | - | - |
| Series | MS | MS621FE | MS621FE |
| Battery Size | 621 | 621 | 621 |
| Output Voltage | 3 V | 3 V | 3 V |
| Chemistry | Lithium | Lithium | Lithium |
| Termination Style | Through Hole | Requires Holder | SMD (SMT) Tab |
| Orientation | Vertical | Vertical | Vertical |
| Diameter | 6.8 mm | 6.8 mm | 6.8 mm |
| Height | 2.1 mm | 2.1 mm | 2.1 mm |
| Rechargeable/Non Rechargeable | Rechargeable | - | - |
| Brand | Seiko Instruments Micro Energy | - | - |
| Voltage Rated | - | 3V | 3V |
| Size Dimension | - | 0.27" Dia x 0.08" H (6.8mm x 2.1mm) | 0.27" Dia x 0.08" H (6.8mm x 2.1mm) |
| Battery Chemistry | - | Lithium | Lithium |
| Battery Cell Size | - | Coin, 6.8mm | Coin, 6.8mm |
| Capacity | - | 5.5mAh | 5.5mAh |
| Rechargeable Non Rechargeable | - | Rechargeable | Rechargeable |
| Type | - | - | Coin Cell Battery with Leads |
| Packaging | - | - | Tray |