Samsung Galaxy S III User Manual page 19

Charging the Battery
Your phone is powered by a rechargeable Li-ion battery. A
wall charger, which is used for charging the battery, is
included with your phone. Use only approved batteries and
chargers. Ask your local Samsung dealer for further details.
Before using your phone for the first time, you must fully
charge the battery. A discharged battery recharges fully in
approximately 4 hours.
Important! It is recommended that you fully charge the battery
before using your device for the first time.
1. Insert the USB cable into the phone's Power/Accessory
port at the bottom of the device.
2. Connect the USB cable to the charging head.
Note: Failure to connect the USB cable correctly may damage
the accessory port and void the phone's warranty.
Getting Started 13