Tenpower 21700 40XG 4000mAh 45A
Tenpower 21700 40XG 4000mAh 45A. High-performance cell for demanding battery packs and DIY builds.
Technical Specifications
| Model | Tenpower 21700 40XG 4000mAh 45A |
| Format | 21700 |
| Nominal Capacity | 4000mAh |
| Discharge Current | 45A |
| Brand | Tenpower |
Safety Warning
Unprotected cell. Always use with a BMS. Never short-circuit or overcharge. Keep away from fire and extreme heat. Not for use in e-cigarettes or similar devices.
Cell Specification
| Item | Specification and comments |
|---|---|
| Model | INR21700-40XG – cylindrical lithium-ion rechargeable cell |
| Nominal capacity | 4000mAh – Charge: 0.5C (2A) to 4.2V, 100mA cut-off; Discharge: 0.2C (800mA) to 2.5V cut-off, 25±3°C (1C = 4000mA) |
| Minimum capacity | 4000mAh – same standard charge/discharge conditions as nominal capacity |
| Internal impedance at 1000Hz | ≈3.5mΩ (25±3°C, 30% SOC) |
| Standard charge | CCCV, 2A, 4.2V, 100mA cut-off |
| Nominal voltage | 3.6V |
| Max. charging current | 12A |
| Max. continuous discharge current | 45A (without temperature cut-off); 90A with 80°C temperature cut-off |
| Pulse discharge current | ≈160A for 5s |
| Discharge cut-off voltage | 2.5V |
| Cycle life | Capacity ≈60% of initial at 600 cycles – Charge: 6A, 4.2V, CCCV 100mA cut-off @RT; Discharge: 40A to 2.5V or 75°C cut-off @RT |
| Cell weight | 70.0g max |
| Cell dimension | Height ≈70.50mm; Diameter ≈21.50mm; Prohibited welding area diameter: ≈3.5mm |
| Operating ambient temperature | Charge: 0~45°C; Discharge: -20~60°C |
| Cell surface temperature | Charge: 0~60°C (recommended recharge release <45°C); Discharge: -20~80°C (recommended re-discharge release <60°C) |
| Storage temperature | 1 year: -20~25°C (*); 3 months: -20~45°C (*); 1 month: -20~60°C (*); capacity recovery ≈90% of standard discharge if stored <30% SOC |
| Storage humidity | ≈60% |
Reviews
There are no reviews yet.