To Respond To A Low-Battery Warning; To Recharge The Battery - HP Compaq Notebook Series Startup Manual

Note
CAUTION

To respond to a low-battery warning

The notebook automatically alerts you when the battery power drops to a critically
low level. The notebook first emits a high-pitched beep or displays a warning
message. Then, if you do not restore power within a short time, the notebook goes
into Hibernation.
Once the notebook enters Hibernation 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.
• Plug in the AC adapter.
If you plug in the AC adapter, you can continue to work while your battery
recharges.
For Intel Pentium 4 processors, speed denotes maximum performance mode on AC
power. Processor speed on battery power is approximately 63.5 percent of
maximum performance mode. For Mobile Intel Pentium 4 processors featuring Intel
SpeedStep technology, speed denotes maximum performance mode. Battery
optimization mode is approximately 80 percent of maximum performance mode.

To recharge the battery

The AC adapter is normally warm whenever plugged into an AC outlet. The
notebook is normally warm while recharging. Don't recharge the notebook in
a briefcase or other confined space, or the battery could overheat.
Plug the AC adapter into the notebook.
To get the longest operating time, wait until the battery charge is below 50 percent
before recharging, and then charge it fully (100 percent). Charging can take
approximately 3 hours. If you continue working while the battery charges, the
charging time may increase.
The operating time for a fully charged battery depends on the notebook model,
power management settings, and level of use.
Batteries and Power Management
Using Battery Power
Startup Guide 25