Toshiba Tecra A4 (PTA42) - Manual (Page 98)

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:
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 bat-
tery pack has at least five minutes of operating time, continue oper-
ating 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.
Battery pack (6 cell)
about 2 days (Standby mode)
about 30 days (Shutdown mode)
Battery pack (12 cell)
about 4 days (Standby mode)
about 60 days (Shutdown mode)
RTC battery about 2 months