Power

Calibrating a Battery Pack

When to Calibrate

Even if a battery pack is heavily used, calibration should be necessary only once a month. You do not have to calibrate a new battery pack before first use.

Calibration does not usually increase battery run time, but it can increase the accuracy of battery charge displays, especially under the following conditions:

When the battery pack has been unused for one month or more.

When the notebook has been running primarily on external power (and rarely on battery power) for more than one month.

When battery charge displays report large changes in the percentage of power remaining within 2 minutes. For example, if the Power Meter displays 20 percent of a full charge remaining and then less than 2 minutes later displays only 5 percent of a full charge remaining, the rapid drop in charge remaining indicates that the battery pack needs calibration.

For more information about battery charge displays, refer to “Monitoring the Charge in a Battery Pack,” earlier in this chapter.

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Hardware and Software Guide

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HP R4003XX, R4000, R4001XX, R4012US, R4025US, R4127US, R4010US manual Calibrating a Battery Pack, When to Calibrate