Samsung SPH-M820 User Manual page 31

Incorrect
Correct
Always use a Samsung-approved desktop charger,
travel charger, or vehicle power adapter to charge your
battery.
Charging Head
USB Cable
With the Samsung-approved Li-Ion battery, you can
recharge the battery before it becomes completely run
down.
Plug the flat end of the charger into the device's
charger jack and the other end into an electrical
outlet. The device turns on with the screen locked
and indicates both its charge state and percent of
charge.
WARNING:
While the device is charging, if the touch screen
does not function due to an unstable power
supply unplug the USB power adapter from the
power outlet or unplug the USB cable from the
device.
2A. Device Basics 18