Panasonic Toughbook CF-19KDRAG6B Reference Manual

Also see for CF-19 series: Supplementary instructions Operating instructions Operating instructions Supplementary guide Operating instructions

31Battery PowerThe “Battery Recalibration” function measures and memorizes the battery capacity. To correct the battery display, use thisfunction to fill the battery and then discharge it completely. Perform the procedure at least once immediately after purchasingthe computer. Normally the interval of battery recalibration is 3 months. The battery display may not be correct when the bat-tery pack deteriorates after a long time use. In this case, perform the procedure again.1 Connect the AC adaptor.2 Close all the applications.3 Perform “Battery Recalibration”.A Click (Start) - [All Programs] - [Panasonic] - [Battery] - [Battery Recalibration].B When the confirmation message appears, click [Start].z Frequent recalibration of the battery can degrade the battery. A caution message appears when the batteryrecalibration is performed at the shorter interval than approximately a month. In this case, cancel the batteryrecalibration.C When the message requests shut down of Windows, click [Yes].The battery recalibration starts.After the battery pack is fully charged, discharging starts. When the discharging is completed, the power goes offautomatically.After the battery recalibration is finished, normal charging starts.NOTEz The temperature range should be 10° C to 30 °C {50° F to 86°F}.z The battery recalibration may take a long time due to the large battery capacity. This is not a malfunction.• Full charge: Approximately 4.5 hours (max.)• Complete discharge: Approximately 4.5 hoursz If the computer is turned off during the battery recalibration (e.g., due to power failure, or accidental removal of the ACadaptor and battery pack), the battery recalibration will not be completed.z You can also perform the battery recalibration with the following procedure.A Restart the computer.B Press and hold F9 while the [Panasonic] boot screen is displayed just after the computer starts the startup proce-dure.C When the remaining battery capacity is displayed, press Enter.D Follow the on-screen instructions.Correcting the Battery Display (Battery Recalibration)