Fogstar 21700 battery
| Manufacturer | E-One Moli Energy Corp. |
| Distribution Partner | NPE Energy Ltd |
| Model | INR21700-P42A |
| Size | 21700 |
| Protection | None |
| Top Cap | Flat |
| Measurements | 21.2mm(W) 70.1mm(H) |
| Weight | 66g |
| Maximum Voltage | 4.2V |
| Nominal Voltage | 3.6V |
| Capacity | 4000mAh |
| Maximum Discharge Rate | 40a |