Battery level < 30%

Once the battery level reaches 30% or less, the LED of the tracker starts to blink red.
As the battery could be draining quickly from 30% to 0%, this means that the tracker must be charged as soon as possible.

Charge the tracker

You just need to plug in your tracker with the provided charging cable and let it load.
When the tracker is put on charge with the cable, the LED of the tracker is steady red.

Tracker fully charged

If the battery was empty, the full charge of the tracker will take 4 hours. 
When the tracker is fully charged, the LED of the tracker turns OFF.