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Taking Your Computer on the Road
Running the Computer on Battery Power
Running the Computer on Battery Power
The computer contains a removable Nickel-metal hydride
(NiMH) battery pack that provides power when you are away
from an AC outlet. You can recharge the battery many times. If
you spend a lot of time on the road, you may also purchase addi-
tional batteries, giving you the potential of many more working
hours away from a power source.
To charge the battery, plug the computer into a live wall socket.
The battery charges when the computer is on or off. It takes
approximately two and a half hours to charge the battery with the
computer off, or approximately three to eleven hours when the
computer is on. There is also an optional battery charger that
charges up to two batteries at the same time. See "Charging More
than One Battery at a Time" on page 129 for more information
about the battery charger.
Aside from the battery pack that powers the computer, there are
two additional batteries: the backup battery and the real-time clock
(RTC) battery. The backup battery maintains its charge for
approximately three days with the computer turned off. If you're
really curious about these batteries, see "What Other Batteries
Does the Computer Have?" on page 228.
Monitoring Battery Power
The computer's battery light gives you an indication of the current
battery charge. The possible states of the battery light are:
Green indicates a full charge.
Orange indicates the battery is charging.
Flashing orange indicates that the charge is running low.
Part I: Getting To Know Your Computer