Samsung EK-GC200 User Manual page 180

After fully charging, disconnect the device
from the charger. First unplug the charger
from the device, and then unplug it from the
electric socket.
14
Do not remove the battery before
removing the charger. This may
damage the device.
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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 charger
should remain close to the electric
socket and easily accessible while
charging.