User’s Manual 6-13
Power and Power-Up Modes
■How often and how long you use the hard disk, optical disc and the
floppy disk drive.
■How much charge the battery contained to begin with.
■How you use optional devices, such as a PC card, to which the battery
supplies power.
■Enabling Standby Mode conserves battery power if you are frequently
turning the computer off and on.
■Where you store your programs and data.
■Closing the LCD display panel when you are not using the keyboard
saves power.
■Operating time decreases at low temperatures.
■The condition of the battery terminals. Make sure the battery terminals
stay clean by wiping them with a clean dry cloth before installing the
battery pack.
Retaining data with power off
When you turn off your computer with fully charged batteries, the batteries
retain data for the following approximate time periods:
Retention time
Battery type State and Retention Time
High capacity battery pack (8800mAh) about 12 days (Standby Mode)
about 115 days (Boot mode)
Extended capacity battery pack (7050mAh) about 9 days (Standby Mode)
about 95 days (Boot mode)
Battery pack (4700mAh) about 6 days (Standby Mode)
about 60 days (Boot mode)
2nd battery pack (3600mAh) about 4 days (Standby Mode)
about 45 days (Boot mode)
RTC battery 30 days