NOTICE
To prevent corrosion, thoroughly dry the USB port, the weather cap, and the surrounding area before charging or connecting to a computer.
The device is powered by a built-in lithium-ion battery that you can charge using a standard wall outlet or a USB port on your computer.
NOTE:
The device will not charge when outside the temperature range of 32° to 104°F (0° to 40°C).
-
Pull up the weather cap
from the USB port 
.
-
Plug the small end of the USB cable into the USB port on the device.
-
Plug the large end of the USB cable into an AC adapter or a computer USB port.
-
Plug the AC adapter into a standard wall outlet.
When you connect the device to a power source, the device turns on.
-
Charge the device completely.
