110Chapter 4.Settings and UpgradeBatteryUsing the Battery Calibration FunctionWhen charging/discharging the battery repeatedly for a short timeonly, the battery usage time may be reduced by the differencebetween the actual battery charge and the remaining chargedisplay.In this case, the actual battery charge and the remaining chargedisplay will be the same by discharging the battery completelyusing the Battery Calibration function, and then recharging itagain.The screen images and terms may differ from actual productdepending on the computer model and driver version.1 Shut down the computer and remove the AC adapter.2 After pressing the Power button, if the Samsung logo screenappears, press the Home button검색공유시작장치설정several times.3 If you select Boot > Smart Battery Calibration, calibration isperformed.Aptio Setup Utility - Copy (C) 2012 American Megatrends, Inc.Boot Device Priority >Secure Boot OffOS Mode SelectionSmart Battery Calibration >UEFI OSTo stop the process, press the Home button.This process takes approximately 3 to 5 hours to finishdepending on the capacity and the remaining battery charge.