Nitecore HLB1300 3.7V 1300mAh USB-C Rechargeable Li-ion Battery Pack

For the UT27

If you're wondering how the Nitecore UT27 Headlamp can be such a powerhouse, here's how: the Nitecore HLB-1300 3.7V 1300mAh USB-C Rechargeable Li-ion Battery Pack. This battery balances convenience and quality in all aspects of its design. Compatible with any USB-C charging cable, this battery can fully charge up in as little as 1h and 50min. The HLB1300 also features 1,300mAh high capacity with 3.7V and 4.81Wh. It's also specifically designed to be lightweight and compact for greater convenience.

For charging, the battery features two basic indicators. The red light appears when you are charging, and when the battery is done, it will shut off and turn on its green light to indicate a full charge. The HLB1300 is also designed to be environmentally friendly with a substantial 500+ charge cycles.