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HP Compaq Business Notebook nc6000 Series - Calibrating a Battery Pack

When to calibrate

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 battery pack before first use. Calibrate the battery pack under the following conditions:
  • When battery charge displays seem inaccurate.
  • When a significant change in battery run time is observed.
  • When the battery pack has not been used for one month or more.

How to calibrate

To calibrate a battery pack, fully charge, fully discharge, then fully recharge the battery pack.

Charging the battery pack

A battery pack can charge whether the notebook is off or in use, but it will charge faster when the notebook is off.
Follow these steps to charge the battery pack:
  1. Insert the battery pack into the notebook.
  2. Connect the notebook to an AC outlet or an optional Automobile Power Adapter/Charger. The battery light on the notebook turns on.
  3. Leave the notebook connected to external power until the battery pack is fully charged. The battery light on the notebook turns off.

Discharging the battery pack

Before beginning a full discharge, disable Hibernation. To disable Hibernation:
  1. Open the Power Options window:
    • In Windows 2000, click Start, Settings, Control Panel, Performance and Maintenance, Power Options, and the Hibernate tab.
    • In Windows XP, click Start, Control Panel, Performance and Maintenance, Power Options, and the Hibernate tab.
  2. Clear the Enable Hibernation check box.
The notebook must remain on while the battery pack is being discharged. The battery pack can discharge whether or not the notebook is in use, but will discharge faster while the notebook is in use.
  • If planning to leave the notebook unattended during the discharge, save work before beginning the discharge procedure.
  • If using the notebook occasionally during the discharge procedure and energy-saving timeouts are set, 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 while the notebook is idle.
    • System-initiated Standby will not occur.
Follow these steps to fully discharge a battery pack:
  1. Select the power icon on the taskbar, or access the Power Schemes tab:
    • In Windows 2000, click Start, Settings, Control Panel, the Power Management icon, and the Power Schemes tab.
    • In Windows XP, click Start, Control Panel, Performance and Maintenance, the Power Options icon, and the Power Schemes tab.
  2. Make a note of the two settings in the Plugged In column and the two settings in the Running on Batteries column so that they can be reset after the calibration.
  3. Use the drop-down lists to set the four options (two in each column) to Never.
  4. Click OK.
  5. Disconnect the notebook from the external power source, but do not turn off the notebook.
  6. Run the notebook on battery power until the battery pack is fully discharged. The battery light begins to blink when the battery pack has discharged to a low-battery condition. When the battery pack is fully discharged, the battery light turns off and the notebook shuts down.

Recharging the battery pack

  1. Connect the notebook to external power and maintain the connection until the battery pack is fully recharged. The battery light on the notebook turns off. The notebook can be used while the battery pack is recharging but the battery pack will charge faster if the notebook is off.
  2. If the notebook is off, turn it on when the battery pack is fully charged and the battery light turns off.
  3. Access the Power Schemes tab:
    • In Windows 2000, click Start, Settings, Control Panel, the Power Management icon, and the Power Schemes tab.
    • In Windows XP, click Start, Control Panel, Performance and Maintenance, the Power Options icon, and the Power Schemes tab.
  4. Reenter the settings recorded for the items in the Plugged In column and the Running on Batteries column.
  5. Click OK.
  caution:
After calibrating the battery pack, reenable Hibernation. Failure to reenable Hibernation may result in a complete battery drain and potential data loss.
To reenable Hibernation, click Start, Settings, Control Panel, Performance and Maintenance, Power Options, and the Hibernate tab. Select the Enable Hibernation check box.

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