Make sure that your usb plug is correctly aligned with that of the USB onto whcih you have plugged it and that the USB port to whcih you have plugged it is providing power.
[Activity Tracker] Why isn't my Activity Tracker charging when I plug it in?
Make sure that your usb plug is correctly aligned with that of the USB onto whcih you have plugged it and that the USB port to whcih you have plugged it is providing power.