Toshiba R400 30 days, RTC battery, Battery type, Retention time, ■Processor speed, ■Screen brightness, ■System Sleep Mode, Battery pack (4000mAh)

Power and Power-Up Modes

Maximizing battery operating time

A battery’s usefulness depends on how long it can supply power on a single charge, while how long the charge lasts in a battery depends on:

■Processor speed■Screen brightness■System Sleep Mode■System Hibernation Mode■Display power off period■Hard disk drive power off period

■How often and for how long you use the hard disk drive and external disk drives, for example, optical disc and floppy diskette drive.

■How much charge the battery contained to begin with.

■How you use optional devices, such as a PC Cards, to which the battery supplies power.

■Whether you enable Sleep Mode, which can conserve battery power if you are frequently turning the computer off and on.

■Where you store your programs and data.

■Whether you close the display panel when you are not using the keyboard - closing the display saves power.

■The environmental temperature - operating time decreases at low temperatures.

■The condition of the battery terminals - you should always ensure the 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 will retain data for the estimated time as follows:

Retention time

Battery type	State and Retention Time
Battery pack (4000mAh)	about 2 days (Sleep Mode)
	about 100 days (Boot Mode)
2nd Battery Pack (4000mAh)	about 4 days (Sleep Mode)
	about 200 days (Boot Mode)
RTC battery	30 days

User’s Manual 6-9