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User’s Manual 6-10
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.
Retention Time
Extending battery life
To maximize the life of your battery packs:
■ 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 then 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 white/green, and the
Battery LED should glow orange 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 indicator glows
white/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.
Battery type State and Retention Time
Battery pack (3 cell) about 28 hours (sleep mode)
about 15 days (shutdown mode)
Battery pack (6 cell) about 57 hours (sleep mode)
about 30 days (shutdown mode)
Battery pack (9 cell) about 86 hours (sleep mode)
about 45 days (shutdown mode)
RTC battery
about 3 months