| Name | OEM Rechargeable Li ion Batteries 40mAh 3.7V ST-501012 |
| capacity | 40mAh |
| Nominal voltage | 3.7V 3.8V 3.85V |
| Charging voltage | 4.2V 4.35V 4.4V |
| Discharging method | constant current discharge |
| Discharge cut-off voltage | 3.0v |
| Standard discharge time | ≥300min |
| Operating time temperature | 20±60° |
| Storage temperature | 25° |