Your phone is powered by a rechargeable lithium-ion battery. To maximize its life and its charging capacity, the first time you charge the battery, charge it overnight. Use only Inmarsat-supplied or approved batteries, and recharge your battery with Inmarsat-supplied or approved chargers for the phone. Do not leave the battery charging for extended periods of time.
The battery can be charged by:
Using the AC charger (connecting to a wall socket)
Using the micro USB cable (connecting to a PC)
Using the car charger (connecting to a vehicle cigarette lighter/power outlet)
Connect the charger to a power source and the micro USB connector to the port at the base of the phone, under the USB/audio protective cover.
When the battery needs charging, the low battery alert sounds, and a Battery low message is displayed. The phone will automatically switch off shortly afterward. You might be able to switch the phone on again, but you cannot make or receive any calls until the battery has been recharged or replaced.