Toshiba 3490CT Toshiba Online User's Guide for Portege 3490CT (10620) - Page 82
Running the computer on battery power, Maximizing battery life
UPC - 032017089341
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82 Mobile Computing Running the computer on battery power Running the computer on battery power Your computer contains a removable, rechargeable lithium ion (Li-ion) 3,000 mAh main battery that provides power when you are away from an AC outlet. You can recharge the main battery many times. In addition to the removable lithium ion main battery, the computer has an internal real-time clock (RTC) battery. This is a nickel metal hydride (NiMH) battery. The RTC battery powers the RTC memory, which stores your system configuration settings and the current time and date for up to a month while the computer is turned off. To increase the length of time you can run the computer on battery power, you can connect a second battery to the optional highcapacity battery connector on the base of the computer. The optional high-capacity battery will provide enough additional power for up to a total of eight hours of use. Maximizing battery life A battery can be recharged many times. Gradually over time it will lose its ability to hold a charge. To maximize the life of your main battery: ❖ Avoid leaving the computer plugged in and unused for more than a few hours. Overcharging the main battery may shorten its life. ❖ If you are not going to use the computer for a long period of time, remove the main battery and the optional high-capacity battery. ❖ Alternate between main battery packs if you have a spare. ❖ Make sure your computer is turned off, or in Hibernation mode, when you are replacing the main battery. ❖ Store spare battery packs in a cool dry place out of direct sunlight.