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User's Manual
POWER AND
POWER-UP MODES
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 (8 cell) 4 days (Resume mode)
45 days (Boot mode)
Battery pack (12 cell) 6 days (Resume mode)
68 days (Boot mode)
RTC battery 60 days
Extending battery life
To maximize the life of your battery pack:
❑ At least once a month, disconnect the computer from a power source and
operate it on battery power until the battery pack fully discharges. Before doing
so, follow the steps below.
1. Turn off the computer’s power.
2. Disconnect the AC adaptor and turn on the computer’s power. If it does not
turn on go to step 4.
3. Operate the computer on battery power for five minutes. If the battery pack
has at least five minutes of operating time, continue operating until the
battery pack is fully discharged. If the battery LED flashes or there is some
other warning to indicate a low battery, go to step 4.
4. Connect the AC adaptor to the computer and the power cord to a power
outlet. The DC IN LED should glow green, and the Battery LED should glow
amber to indicate that the battery pack is being charged. If the DC IN
indicator does not glow, power is not being supplied. Check the connections
for the AC adaptor and power cord.
5. Charge the battery pack until the Battery LED glows green.
❑ If you have extra battery packs, rotate their use.
❑ If you will not be using the system for an extended period, more than one
month, remove the battery pack.
❑ Disconnect the AC adaptor when the battery is fully charged. Overcharging
makes the battery hot and shortens life.
❑ If you are not going to use the computer for more than eight hours, disconnect
the AC adaptor.
❑ Store spare battery packs in a cool dry place out of direct sunlight.