iJoy 21700 40A 3750 mAh High Drain Battery
Flat top High Drain 40 AMP battery.
- Size: 21700
- Capacity: 3750mAh
- Nominal Voltage: 3.7V
- Peak Voltage: 4.2V
- Rechargeable: Yes
Note: As for the chemistry of this battery, there is conflicting information online about whether it is IMR, NCR or Li-Ni.