To Respond To A Low-Battery Warning; To Recharge The Battery; To Get The Most From Your Batteries - HP Notebook PC Reference Manual

Note
CAUTION
Batteries and Power Management
Using Battery Power

To respond to a low-battery warning

The computer automatically alerts you when the battery power drops to a critically low
level. The computer first emits a high-pitched beep or displays a warning message. Then,
if you do not restore power within a short time, the computer goes into Hibernate mode.
Once the computer enters Hibernate mode in this way, you won't be able to turn it on
again until you restore power by doing one of the following:
• Replace the battery with a charged one. See "Step 1: Install the battery" on page 19.
• Plug in the AC adapter. See "Step 2: Connect AC power" on page 21.
If you plug in the AC adapter, you can continue to work while your battery recharges.

To recharge the battery

The AC adapter is normally warm whenever plugged into an AC outlet. The
computer is normally warm while recharging. Don't recharge the computer in a
briefcase or other confined space, or its battery could overheat.
• Plug the AC adapter into the computer.
To get the longest operating time, wait until the battery's charge is below 50% before
recharging, and then charge it fully (100%). Charging can take up to approximately
3 hours. If you continue working while the battery charges, the charging time may
increase to 4 hours.
A fully charged battery can operate the computer for up to 3 hours, depending on your
computer's model, power management settings, and level of use.

To get the most from your batteries

Follow these suggestions to make your battery's power last as long as possible.
• Plug in the AC adapter, especially when using a CD-ROM or DVD drive, or any
external connections such as a PC Card or a modem.
• Set the display brightness to the lowest comfortable level (Fn+F1).
• Put the computer in Standby mode whenever you are not using it for a short while:
press the power button, or click Start, Turn Off Computer (or Shut Down), Standby.
56 Reference Guide