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52 Chapter 3
Charging a Battery
When the power adapter that came with your computer is connected, the battery is
recharging whether the computer is off, on, or in sleep. However, the battery will recharge
more quickly if the computer is off or in sleep. You can monitor the battery charge level
using the battery status icon in the menu bar:
The battery charge level displayed is based on the amount of power left in the battery with
the applications, peripheral devices, and system settings (display brightness, Energy Saver
settings, and so on) you are currently using. To make more battery power available, close
applications and disconnect peripheral devices not in use, and adjust your Energy Saver
settings (see “Battery-Conservation Tips” on page 53).
Calibrating a New Battery for Best Performance
To get the longest running time from a new PowerBook battery, let the battery run down
within the first week of use and then fully charge it one time. Follow these steps:
1 Plug in the power adapter and fully charge your PowerBook battery until the battery
indicator lights and the onscreen meter indicate that the battery is fully charged. A green
light on the power adapter plug also indicates that the battery is fully charged.
2 Disconnect the power adapter and use your PowerBook. When your battery gets low, you
will see the first low battery warning dialog on the screen. Continue to use your PowerBook
until it goes to sleep; at that point the battery has been sufficiently drained for calibration.
3 Connect the power adapter and leave it connected until the battery is fully charged again.
Important You have to fully discharge and then charge your battery only once to calibrate
it. After that, you can connect and disconnect the power adapter when the battery is at any
charge level.
LL2222.Book Page 52 Friday, December 13, 2002 12:11 PM