A rechargeable, high-capacity lithium-ion battery, the Petzl Core Headlamp battery functions as either a main energy source or a backup option for almost all Petzl headlamps. It features a charge indicator and a USB/micro-USB charging port. It performs well at low temperatures, which is a plus for cold dawn and dusk missions. If you are in need of replacing an old battery in your headlamp or simply want another on hand in case of making an emergency swap, grab the Petzl Core Headlamp Battery.