This article explains how to charge your inReach.

NOTICE! To prevent corrosion, thoroughly dry the USB port, the weather cap, and the surrounding area before charging or connecting to a computer.

NOTE: The device does not charge when it is outside the approved temperature range (Charging temperature range: 0° to 45°C (from 32° to 113°F) 

1. Lift the weather cap ① .

2. Plug the small end of the power cable into the USB port ② on the device.

3. Plug the other end of the power cable into an appropriate power source.

4. Charge the device completely.