Samsung GT-B5330 User Manual page 21

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When the battery is fully charged, first unplug the travel
adapter from the device, and then from the electrical
socket.
Do not remove the battery while the device is
connected to the travel adapter. Doing so may damage
the device.
To save energy, unplug the travel adapter when not in
use. The travel adapter does not have a power switch, so
you must unplug the travel adapter from the electrical
socket when not in use to avoid wasting power. The
device should remain close to the electrical socket while
charging.
About the battery charging icons
When you charge the battery while the device is off, the
following icons will show the current battery charging status:
Charging Fully charged
Assembling
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