How to Calibrate laptop battery

How to Calibrate laptop battery
After using for months, the battery get weak and cant fully discharge. Also in this situation the compaq presario 2100 laptop battery’s 76% even less in work.Now we need to Calibrate laptop battery. I found a note about recondition laptop battery from HP manufacturer’s handbook. Surprisingly, it offered some really helpful laptop battery calibration and maintenance tips, which I’d like to share with you:

Calibrating a Battery Pack

When to Calibrate laptop battery

Even if a battery pack is heavily used, it should not be necessary to calibrate it more than once a month. It is not necessary to calibrate a new laptop battery pack before first use. However, make sure that the battery pack is fully charged, especially if it is the only power source.

Calibrate laptop battery pack under the following conditions:

When the battery status display seems inaccurate.

When you observe a significant change in normal batteryrun time.

When the battery pack has not been used for one monthor more.

To Calibrate laptop battery pack, you must fully charge, fully discharge, and then fully recharge the battery pack.
Charging the Battery Pack
Fully charge the battery pack when the notebook is in use. To charge the battery pack:

1. Insert the battery pack into the notebook.

2. Connect the notebook to external power through an AC adapter. (The battery light turns on.)

The battery light turns off when the battery pack is fully charged.

Discharging the Battery Pack
Disabling Hibernation

To fully discharge the battery pack, disable Hibernation temporarily.

To disable Hibernation:

Select the Power Meter icon on the taskbar or access Power Options > Hibernate, and clear the Enable Hibernate support check box.

Discharging the battery Pack

After the battery light turns off, which indicates that the battery pack is fully charged, begin discharging the battery pack.

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