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Chapter 3 Using your Tablet PC 45
Charging the battery
When the Tablet PC is connected to AC power, the battery automatically charges until it
reaches full charge, even if the Tablet PC is being used The battery status light on the Tablet
PC will blink amber when the battery is installed and AC power is applied to the tablet.
If two batteries are installed, the battery that the tablet is using charges first, then the
second battery charges. The charging sequence is staggered to ensure that both batteries
are being fully charged at nearly the same time. The first battery (with lowest remaining
power) charges to the 90% level, followed by the second battery charging to the 100% level.
Then, the tablet switches to the first running battery.
For information about the battery status light, see “Battery status light” on page 12.
CAUTION: To avoid injury, keep the battery within the recommended temperature range
while it is charging. If the battery has been subjected to a hot environment, wait until it
cools to room temperature before recharging it. For more information, see the Safety and
Regulatory Guide included with the Tablet PC.
Battery and power management tips
To lengthen the batterys usable life, use AC power when you can. The battery will charge
automatically while you run on AC power, so leave the battery in the tablet while you are
working.
For optimal battery life, use AC power when using a CD or DVD player.
When running on battery power, place the system in Hibernate or Sleep mode if you are
going to leave it unattended for more than a few minutes (page 42).
Remember that the display, processor, PC Cards, wireless cards, and accessory drives all
draw on the battery, so adjust properties and disable unused accessories while running
on battery power.
When running on battery power, adjust the display brightness to a dimmer setting and
enable Dynamic brightness. See “Adjusting the display brightness” on page 35.
Turn off wireless devices when they are not being used.
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