To fully charge the battery:

1.Insert the battery into the computer.

2.Connect the computer to an AC adapter or an optional power adapter, and then plug the adapter into external power.

3.Leave the computer plugged into external power until the battery is fully charged.

Step 2: Disable Hibernation and Sleep

1.Click the battery meter icon in the notification area, and then click Power options.

– or –

Select Start > Control Panel > System and Security > Power Options.

2.Under the current power plan, click Change plan settings.

3.Record the Turn off the display settings listed in the On battery column so that you can reset them after the calibration.

4.Change the Turn off the display settings to Never.

5.Click Change advanced power settings.

6.Click the plus sign next to Sleep, and then click the plus sign next to Hibernate after.

7.Record the On battery setting under Hibernate after so that you can reset it after the calibration.

8.Change the On battery setting to Never.

9.Click OK.

10.Click Save changes.

Step 3: Discharge the battery

The computer must remain on while the battery is being discharged. The battery can discharge whether or not you are using the computer, but the battery will discharge faster while you are using it.

●If you plan to leave the computer unattended during the discharge, save your information before beginning the discharge procedure.

●If you use the computer occasionally during the discharge procedure and have set energy-saving timeouts, expect the following performance from the system during the discharge process:

◦The monitor will not turn off automatically.

◦Hard drive speed will not decrease automatically when the computer is idle.

◦System-initiated Hibernation will not occur.

To discharge a battery:

1.Unplug the computer from its external power source, but do not turn off the computer.

2.Run the computer on battery power until the battery is discharged.

68 Chapter 5 Power management