Battery packs
Power 7–9
When the computer cannot restore from
hibernation
To resolve a low-battery condition when the computer lacks the
power to restore from hibernation:
1. Insert a charged battery pack or plug the computer into
external power.
2. Restore from hibernation by pressing the power button.
Calibrating a battery pack
Three steps are involved in calibrating a battery pack: fully
charging, fully discharging, and then fully recharging.
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. Calibrate a battery pack under the
following conditions:
■ When battery charge displays seem inaccurate
■ When you observe a significant change in battery run time
■ When the battery pack has been unused for one month
or
more
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