HP Pavilion dm3-2010us Entertainment Notebook PC - Manual (Page 52)

To test the AC adapter:
1. Remove the battery from the computer.
2. Connect the AC adapter to the computer, plug the power cord into the AC adapter, and then
plug the power cord into an AC outlet.
3. Turn on the computer.
● If the power light turns on, the AC adapter is working properly.
● If the power light remains off, the AC adapter is not functioning and should be replaced.
Contact technical support for information on obtaining a replacement AC power adapter. Select
Start > Help and Support > Get assistance.
Using battery power
When a charged battery is in the computer and the computer is not plugged into external power, the
computer runs on battery power. When the computer is plugged into external AC power, the
computer runs on AC power.
If the computer contains a charged battery and is running on external AC power supplied through the
AC adapter, the computer switches to battery power if the AC adapter is disconnected from the
computer.
NOTE: The display brightness is decreased to save battery life when you disconnect AC power. To
increase display brightness, use the increase brightness key or reconnect the AC adapter.
You can keep a battery in the computer or in storage, depending on how you work. Keeping the
battery in the computer whenever the computer is plugged into AC power charges the battery and
also protects your work in case of a power outage. However, a battery in the computer slowly
discharges when the computer is off and unplugged from external power.
WARNING! To reduce potential safety issues, use only the battery provided with the computer, a
replacement battery provided by HP, or a compatible battery purchased from HP.
Finding battery information in Help and Support
Help and Support provides the following tools and information about the battery:
● Battery Check tool to test battery performance
● Information on calibration, power management, and proper care and storage to maximize battery
life
● Information on battery types, specifications, life cycles, and capacity
To access battery information:
▲ Select Start > Help and Support > Learn > Power Plans: Frequently Asked Questions.
Using Battery Check
Help and Support provides information on the status of the battery installed in the computer.
42 Chapter 6 Power management