| Color | Black |
| Brand | kinfire |
| Model | K40 |
| Quantity | 1 Piece |
| Material | Lithium-ion |
| Cell Type | Lithium Ion |
| Battery Model | 18650 |
| Head Type | Flat Top |
| Mark Capacity | 4400 mAh |
| Actual Capacity | 4400 mAh |
| Voltage | 8.4 V |
| Rechargeable | Yes |
| Rechargeable Times | Others、600 |
| Built-in Protected Circuit | Yes |
| Over Voltage Protection | Yes |
| Short-Circuit Protection | Yes |
| Over-Charging Protection | Yes |
| Over-Discharging Protection | Yes |
| Mercury Free | Yes |
| Interface | 5.5 (outer)、 2.1 (inner) mm |
| Battery Pack Form | 2-in-Series、 2-in-Parallel |
| Certification | CE / MSDS / UN38.3 |
| Packing List | 1 x 18650 battery pack (70cm-cable) 1 x Anti-press nylon bag 1 x AC power charger adapter (100~240V / 1000mA / 80cm-cable) |