Streamlight's 18650 button-top Lithium Ion battery is rechargeable up to 500 times. These Streamlight products accept 18650 batteries: ProTac HL USB, ProTac HL 4.
| Attribute | Value |
| Nominal Voltage | 3.7 Volt |
| Rated Capacity mAh | 2600 |
| Configuration | Battery Stick |
| Charge Time | 3.5 hours |
| Chemical Composition | Lithium |
| Rechargeable | Yes |
| Quantity | 1 |
| Manufacturer Part Number | 22101 |