User’s Manual 1-16IntroductionOptionsYou can add a number of options to make your computer even morepowerful and convenient to use. Refer to Chapter 8, Optional Devices, fordetails. The following options are available:TOSHIBA USB Sleepand Charge UtilityThis utility is able to either enable or disable theUSB Sleep and Charge function.This utility shows the positions of USB ports thatsupport the USB Sleep and Charge function anddisplays the battery’s remaining capacity.To start this utility, click Start All ProgramsTOSHIBA Utilities USB Sleep and Charge.Memory expansion Two memory modules can be installed in thiscomputer.Use only compatible DDRII or DDRIII memory modules. See yourTOSHIBA dealer for details.* The availability of DDRII or DDRIII depends on the model you purchased.Battery pack An additional battery pack can be purchasedfrom your TOSHIBA dealer. Use it as a spare toincrease your computer operating time.AC Adaptor If you use your computer at more than one sitefrequently, it may be convenient to purchase anadditional AC adaptor for each site so you willnot have to carry the adaptor with you.