Toshiba Satellite Pro 4300 User Manual - Page 78

Battery types The computer has two types of batteries: Battery pack Real Time Clock (RTC) battery Battery pack When the AC adaptor is not connected, the computer's main power source is a removable lithium ion battery pack, also referred to in this manual as the battery. You can purchase additional battery packs for extended use of the computer away from an AC power source. The battery is a disposable item. When its operation becomes short even when fully charged, replace it with a new one. The battery pack is a lithium ion battery, which can explode if not properly replaced, used, handled or disposed of. Dispose of the battery as required by local ordinances or regulations. Use only batteries recommended by Toshiba as replacements. Do not remove the battery pack while the computer is in Resume mode. Data in memory will be lost. Real Time Clock battery The Real Time Clock (RTC) battery provides power for the internal real time clock and calendar. It also maintains the system configuration. If the RTC battery becomes completely discharged, the system loses this data and the real time clock and calendar stop working. The following message appears when you turn on the power: **** Bad RTC battery **** **** Bad Check sum (CMOS) **** Check system. Then press [F1] key. The computer's RTC battery is a nickel metal hydride (NiMH) battery and should be replaced only by your dealer or by a Toshiba service representative. The battery can explode if not properly replaced, used, handled or disposed of. Dispose of the battery as required by local ordinances or regulations. 6-4 Power and Power-Up Modes User's Manual