Samsung NP-X22-K01-SEA - Manual (Page 145)

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Disabling Unused Devices
If you turn off unused devices, battery lifetime will
improve.
1
Click Device Manager from Start > Control Panel
> Performance and Maintenance > Systems >
Hardware tab.
2
Right-click the devices that you are not using and
select Disabled.
Enabling Battery Calibration
If you charge the battery to use that has not been used
up, the gap between actual battery capacity and battery
residual amount happens to have. Accordingly the battery
life may get shorter.
In this case, use the Battery Calibration feature to
completely discharge the battery and charge it again.
Then this gap will disappear.
1
Turn off the computer and remove the AC adapter.
2
Turn on the computer again. When the SAMSUNG
logo appears, press the F2 key to enter the Setup.
3
Select Boot Menu > Smart Battery Calibration and
press the Enter key.
4
Select Yes from the Battery Calibration
Confirmation window and press the Enter key.
The Battery Calibration starts. To stop it, press the
Esc key.
It takes about three to five hours depending on the
battery capacity and residual amount.