Samsung EB-PA510 Manuel De L'utilisateur page 248

Getting started
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After fully charging, disconnect the battery pack from the charger.
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.
Checking the remaining battery power
Check the remaining battery power by pressing the Battery Level button.
The indicator lights alerts you to the remaining battery power.
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