Power

Battery packs
Power 7–11
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 sliding the power switch toward
the front of the computer.
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 you observe a significant change in battery run time
■ When the battery pack has been unused for one month
or more
How to calibrate
Three steps are involved in calibrating a battery pack: fully
charging, fully discharging, and then fully recharging.