Toshiba A5 User Manual page 111

Leaving the AC adapter connected will shorten battery life. At least once a
week, run the computer on battery power until the battery is fully discharged,
then recharge the battery.
Monitoring battery capacity
Remaining battery power can be monitored by the TOSHIBA Power Saver.
Refer to
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Wait for a moment after turning on the computer before trying to monitor
the remaining operating time. The computer needs this time to check
the battery's remaining capacity.
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With repeated discharges and recharges, the battery's capacity will
gradually decrease. Therefore, an often used, older battery will not
operate for as long as a new battery even when both are fully charged.
Maximizing battery operating time
A battery's usefulness depends on how long it can supply power on a single
charge.
How long the charge lasts in a battery depends on:
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How you configure the computer (for example, whether you enable
battery power saving options). The computer provides a battery save
mode to conserve battery power. This mode has the following options:
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How often and how long you use the hard disk, optical media drive and
the diskette drive (if one is connected).
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How much charge the battery contained to begin with.
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How you use optional devices, such as a PC Card, to which the battery
supplies power.
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Enabling Standby Mode or Hibernation Mode conserves battery power
if you are frequently turning the computer off and on.
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Where you store your programs and data.
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Closing the display when you are not using the keyboard saves power.
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Operating time decreases at low temperatures.
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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.
TOSHIBA A5
Utilities in Chapter 1,
Display auto off
Hard Disk Drive auto off
System auto off
LCD brightness
Power and Power-Up Modes
TOSHIBA A5 Features.
6-9