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Closing the display when you are not using the keyboard saves power.
Operating time decreases at low temperatures.
The condition of the battery terminals. Make sure the battery terminals stay clean by
wiping them with a clean dry cloth before installing the battery pack.
Retaining Data With Power Off
When you turn off your computer with fully charged batteries, the batteries retain data for the
following approximate time periods:
Battery pack 4 days
Back up battery 5 hours
RTC battery 1 month
Extending Battery Life
To maximize the life of your battery pack:
Occasionally completely discharge the battery before you recharge it.
If you have extra battery packs, rotate their use.
If you will not be using the system for an extended period, remove the battery pack.
Disconnect the AC power cord when the battery is fully charged. Overcharging makes
the battery hot and shortens life.
Store spare battery packs in a cool dry place out of direct sunlight.
Replacing the Battery Pack
When the battery pack reaches the end of its operating life you will need to install a new one.
The life of the battery pack is generally about 500 recharges. If the Battery LED flashes
orange shortly after fully recharging the battery, the battery pack needs to be replaced.
You might also replace a discharged battery pack with charged spare when you are operating
your computer away from an AC power source. This section explains how to remove and
install battery packs.
CAUTION
When handling battery packs, be careful not to short circuit their
terminals.