10 Quick Reference GuideAbout Your ComputerSee your online User’s Guide for detailed information about your computer. To access the User’s Guide(depending on your operating system), either double-click the User’s Guide icon on your desktop, or clickthe Start button, click Help and Support Center, and then click User and system guides. The followingitems address some of the more commonly asked questions about the computer.• Modem and network adapter: The computer may include both a v.92 56K modem and a 10/100/1000Ethernet network adapter on the system board. For connector locations, see "Back View" on page 12.For more information on ports and connectors, see "About Your Computer" in your online User’s Guide.Battery life and usage: Various batteries are available for use with your computer. Performing certaintypes of operations, such as extended wireless operation, can significantly reduce battery life andoperating time.For more information about battery performance and usage, see "Using a Battery" on page 14.For more information about conserving power, see your User’s Guide.• Docking devices: Your computer supports the Dell™ Media Base, the Dell D/Dock Expansion Station,and the Dell D/Port Advanced Port Replicator.NOTE: The D420 has been optimally designed to be used with the slim Media Base for docking. However,it is compatible with the D-Family D/Port and D/Dock. With the use of the D-Family D/Port and D/Dock, allports can be effectively utilized except for the 1394 port. If the use of this port is required, it is recommendedthat you utilize the Media Base as your primary docking device.NOTE: Docking devices may not be available in all countries.– For information on your optional docking device, see the documentation that accompaniedthe device.For information on obtaining optimal performance when using a docking device with this computer, see"Solving Problems" in your online User’s Guide.