Инструкции Пользователя для Samsung NP270E5G-K02J

When charging/discharging the battery repeatedly for a short time 

only, the battery usage time may be reduced by the difference 

between the actual battery charge and the remaining charge 

display.
In this case, the actual battery charge and the remaining charge 

display will be the same by discharging the battery completely 

using the Battery Calibration function, and then recharging it 

again.

The screen images and terms may differ from actual product 

depending on the computer model and driver version. 

  Disconnect the AC power adapter after turning off the 

computer.

  Turn the computer back on, and press the F2 key to enter the 

Setup screen.

  Select Advanced > Smart Battery Calibration. 

Alternatively, move to the Boot > Smart Battery Calibration 

item using the direction keys and press <Enter>. Highlight 

Yes in the Battery Calibration Confirmation window and 

press <Enter>.

  The Battery Calibration function is activated and the battery 

is forcefully discharged. To stop the operation, press the 

<Esc> button.
This operation requires 3~5 hours depending on the battery 

capacity and the remaining battery charge.