Charge the battery before you use your watch for the first time, or when you haven’t used it for an extended period.
The first time you charge your watch; it will start automatically, and you will be asked to select language. The battery indicator will not be visible initially.
Connect the charging cable to an USB A power adapter or a USB A computer port.
Attach your watch to the charging dock, making sure that the charging terminals align. It will start automatically.
The battery indicator on the watch face turns green to show that the unit is being charged.