Samsung N128 User Manual page 74

3
Move to the Boot > Smart Battery
Calibration item using the direction
keys and press <Enter>.
4
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.