Samsung GT-I9506 Quick Start Manual page 10

Getting started
Connect the USB cable to the USB power adaptor
and then plug the end of the USB cable into the
multipurpose jack.
Connecting the charger improperly may cause
serious damage to the device. Any damage
caused by misuse is not covered by the
warranty.
10
After fully charging, disconnect the device from the
charger. First unplug the charger from the device, and
then unplug it from the electric socket.
Do not remove the battery before removing the
charger. This may damage the device.
To save energy, unplug the charger when not in
use. The charger does not have a power switch,
so you must unplug the charger from the
electric socket when not in use to avoid wasting
power. The device should remain close to the
electric socket while charging.