Locate the rubber covering in the middle of the flashlight and open the rubber cover exposing the USB-C charging socket, connect the charging cable to the USB-C socket.
While flashlight is charging, the blue LED battery level indicator lights located imbetween the power switches will illuminate and flash, showing battery level.
Once flashlight has reached full charge, the LED battery level indicator will illuminate all 4 lights on solid blue.
Once flashlight is fully charged, disconnect the USB-C cable
For ideal battery performance Astro Night recommend recharging the HL-X1 every few months while not in use or in storage.
Recharging times will vary depending on your charging ports output performance.