To turn your battery-operated lamp into a lithium-ion rechargeable lamp compatible with the bxr headlamp series, lpr chest lights and gpr portable lamps allows you to convert a battery lamp into a rechargeable lamp can be used instead of the 3 alkaline batteries supplied with the lamp direct access to the usb-c port without removing the battery from the lamp through the battery compartment cover . Usb-c cable included with the battery weight: 24 g capacity: 700 mah, 3.7 V charge time: 6 h bi-colour led charging indicator