Dell Vostro 1000 Owner's Manual page 40

NOTE:
To ensure maximum battery operating time, connect only your computer to a
UPS. Connect other devices, such as a printer, to a separate power strip that
provides surge protection.
A UPS protects against power fluctuations and interruptions. UPS devices
contain a battery that provides temporary power to connected devices when
AC power is interrupted. The battery charges while AC power is available. See
the UPS manufacturer documentation for information on battery operating
time and to ensure that the device is approved by Underwriters Laboratories
(UL).
40
Setting Up Your Computer