Справочник Пользователя для Samsung R20plus

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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.

  Disconnect the AC power adapter after turning off 

the computer.

  Restart your computer and press the 

F2 button when

the Samsung logo appears, to start the BIOS Setup.

  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.