Compaq Presario M2000 manual Calibrating a Battery Pack, When to Calibrate

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 percent 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 the “Monitoring the Charge in a Battery Pack” section earlier in this chapter.

Hardware and Software Guide 3–19