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1-8 User’s Manual
L550/L550D/L555/L555D
Keyboard
Pointing Device
Power
Ports
Built-in The internal keyboard provides dedicated cursor
control overlay keys, and Keys.
The keyboard is compatible with the IBM
®
enhanced keyboard. Refer to Chapter 5, The
Keyboard, for details.
Built-in Touch Pad The integrated Touch Pad and control buttons in
the palm rest allow control of the on-screen
pointer and support functions such as the
scrolling of windows.
Battery pack The computer is powered by one rechargeable
lithium-ion battery pack.
RTC battery The internal RTC battery backs up the Real Time
Clock (RTC) and calendar.
AC adaptor The AC adaptor provides power to the system
and recharges the batteries when they are low.
It comes with a detachable power cord which will
either have a 2-pin or 3-pin plug enclosure.
As the AC adaptor is universal, it can receive a
range of AC voltages from 100 to 240 volts,
however you should note that the output current
varies among different models. Using the wrong
adaptor can damage your computer. Refer to the
AC adaptor section in Chapter 2, The Grand
Tour.
External monitor This port provides 15-pin, analog VGA port.
This port allows you to connect an external
monitor to the computer. Some models include
this feature.
Universal Serial Bus
(USB 2.0)
The computer supports multiple Universal Serial
Bus ports that comply with the USB 2.0 standard.
One of the USB ports has an eSATA (External
Serial ATA) function.