Samsung NP900X3B-A01US User Guide - Page 85
Using the Battery Calibration Function
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Battery Chapter 3. Settings and Upgrade 84 Alternatively, to extend the battery life Press the F2 key when the Samsung logo appears in the booting sequence to enter the BIOS Setup, select Advanced > Battery Life Cycle Extension, and set it to Enable. Then you can use the battery life cycle extension mode. Using the Battery Calibration Function 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. 3 Move to the Boot > Smart Battery Calibration item using the direction keys and XpXrXeXXsXsXX. 6QWEJ2CF/QWUG +PVGTPCN.#0 2:'1241/ 5OCTV$CVVGT[%CNKDTCVKQP ='PCDNGF? ='PCDNGF? =&KUCDNGF? 4 Highlight Yes in the Battery Calibration Confirmation window and press . The Battery Calibration function is activated and the battery is forcefully discharged. To stop the operation, press the button. This operation requires 3~5 hours depending on the battery capacity and the remaining battery charge. 1 Disconnect the AC power adapter after turning off the computer. 2 Restart your computer and press the F2 button when the Samsung logo appears, to start the BIOS Setup.