HP Pavilion ze4400 HP Pavilion ze4x00, ze5x00 and specific xt notebook series - Page 33

Note CAUTION Batteries and Power Management Using Battery Power 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 enters Hibernation. After 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 procedures: • 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. To recharge the battery The AC adapter is normally warm when plugged into an AC outlet. The notebook is normally warm while recharging. Do not 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, then charge it fully (100 percent). Charging can take up to several 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. Startup Guide 25