Toshiba Satellite P35 Satellite P30/P35 User's Guide (PDF) - Page 114

114 Mobile Computing Monitoring battery power The remaining battery charge is indicated on the top-left side of the dialog box. With repeated discharges and recharges, the battery's capacity gradually decreases. A frequently used older battery does not power the computer for as long as a new battery, even when both are fully charged. TECHNICAL NOTE: The computer drains the battery faster at low temperatures. Check your remaining charge frequently if you are working in temperatures below 50 degrees Fahrenheit. The computer calculates the remaining battery charge based on your current rate of power use and other factors such as the age of the battery. What to do when the battery runs low When the battery runs low you can: ❖ Plug the computer into an external power source and recharge the battery. ❖ Put the computer in Hibernate mode and replace the battery with a charged spare. ❖ Save your work and turn off the computer. If you do not set any of these options before the battery completely runs out of power, the computer automatically enters Hibernation mode and turns itself off. Hibernation mode keeps track of where you were so, when you turn on the power again, you can continue where you left off. The computer stores the information on what you were doing until the battery runs out of power. If you have Hibernation mode enabled (the default), the computer copies the details of your open programs and files to the hard disk before shutting down.