Please follow the steps below to charge the battery
2. Connect the Micro USB plug of the charging cable to the light
3. Connect the USB plug of the charging cable to a powered USB adapter or a computer USB port if you are not sure whether the adapter is good or not.
4.Click the power button on the tail cap and observe the blue indicator beneath the front side button. It has two brightness settings to indicate the charging status.
A. If the blue indicator is faint or very dim, the light is not charging. Click the power button switch again.
B. If the blue indicator stays dim when clicking the power switch, the battery is not making proper contact. Go back to step 1 and ensure both the head and the tail cap are fully tightened.
C.When the blue indicator stays steady on the brighter setting, the light is charging the battery.
5. A full charging takes about 6 hours. When it is completed, the light will terminate the charging process automatically.