Description
Button top can be added, and the size is 2-3mm longer than a standard 21700 cell like flat top & unprotected. The button top is widely required for flashlights, doorbells and other devices.
-7%Sold out
BATTERY VAPCELL K40 21700 4000MAH 1PCS
৳ 1,400.00
- Model: K40
- Size: 21.1*72.0mm
- Typical Capacity: 4000mAh (0.2C discharge)
- Min capacity: 3900mAh (0.2C discharge)
- Nominal voltage: 3.60V
- Max Continuous Discharge Current:30A
- Max Discharge Current: 45A with 80℃ cut
- End-of-charge voltage: 4.20V
- End-of-discharge Voltage: 2.5V
- Weight: 68g ( Appr)
- Internal resistance: 10mΩ ( Appr) （AC 1kHz）
- Standard Charge: 2000mA,CCCV 100mA cut-off
- Quick Charge Current: 6000mA
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