Samsung SCH-S960RWBTFN - Manual (Page 21)

Charging Head
USB Cable
Correct
Incorrect
Charging the Battery
Your device is powered by a rechargeable Li-ion battery. A wall
charger, which is used for charging the battery, is included with your
device. Use only approved batteries and chargers. Ask your local
Samsung dealer for further details.
Before using your device for the first time, you must fully charge the
battery. A discharged battery recharges fully in approximately 4
hours.
Getting Started 16