Dell Latitude D420

  • Editors' rating
    7.2 Very good


  • Slim, lightweight design
  • full-size keyboard
  • Wi-Fi Catcher works even when system is powered off


  • High native resolution means tiny type

Dell's business-minded Latitude notebooks have always been more about function than form, but the Latitude D420 manages to pack some decent specs into a package that's both small and attractive, making this ultraportable the smallest notebook that Dell currently offers.

With almost a full workday's worth of battery life, the Latitude D420 stands up admirably to other similarly configured systems in its price range, such as the Lenovo 3000 V100. This 1.66kg system has recently been upgraded to include Intel's Core Duo processor, and at £1,069 (ex. VAT) it's a solid choice for business users who need power and portability at the same time.

The charcoal-and-silver case is appropriately conservative-looking; measuring 30cm wide, 22cm deep (24.7cm with the bigger nine-cell battery) and just a hair over 2.6cm high, it's an easy fit for notebook cases or shoulder bags. The almost all-metal construction gives the Latitude D420 a reassuring sturdiness, and the system feels like it could stand up to the rigours of regular travel. Dell refers to it (and in fact, all Latitude, Precision and Inspiron notebooks) as 'RoadReady' -- a bit of proprietary jargon that means the designs have been tested to withstand reasonable extremes of humidity, temperature and mild shocks.

Like most notebooks of its size, the Latitude D420's wide-aspect 12.1in. WXGA UltraSharp display has a native resolution of 1,280 by 800 pixels. The small screen at that resolution makes for some potentially hard-to-read text, but we didn't have any trouble with basic Web surfing or word processing. The display's crispness partially makes up for the loss of impact that comes from a smaller display. Although it's not the brightest notebook screen we've seen, it was easy to see in a brightly lit office environment.

Despite the overall compact feel of the Latitude D420, Dell manages to cram a full-size keyboard into the case, leaving no oddly placed or hard-to-hit small keys. Both a pointer and a touchpad are included, catering to both major schools of notebook pointer control. There are also two sets of left and right mouse buttons, one pair above the touch pad and one below it. You can set up the touchpad for horizontal or vertical scrolling -- a must for navigating long Web pages or documents.

The Latitude D420 has a fairly basic set of ports for a business system, including two USB 2.0 ports and a mini-FireWire port on the rear, plus a PC Card slot, an SD card reader and microphone and headphone jacks on the left side. Video output is limited to a basic VGA connection. For networking, there's Ethernet, modem and 802.11a/b/g wireless; Bluetooth is optional (add £12 ex. VAT) and so is a Vodafone SIM providing a 3G / HSDPA wide-area wireless connection (add £125 ex. VAT).

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Like other members of the Latitude line, the D420 includes a handy Wi-Fi Catcher; the Wi-Fi on/off switch doubles as a Wi-Fi detector even when the lid is closed or the computer is powered off.

Being an ultraportable system, there's no internal optical drive, but Dell offers a variety of optical drive options. Our review unit came with a Media Base that added a DVI output and parallel port, plus a DVD burner. If you don’t need an internal drive, switching to an external DVD/CDRW drive will knock £65 (ex. VAT) off the price, or an external CD drive will save £78 (ex. VAT.)

For such a small system, our Latitude D420 review unit offered a decent set of components, including a 1.2GHz Intel Core Duo CPU, 1GB of DDR2-533MHz RAM and a 60GB 4,200rpm hard drive. Graphics are provided by Intel's Mobile Express 945GM chipset, which should be fine for office use and occasional media viewing. Although every manufacturer seems to be hopping on the Core 2 Duo bandwagon, Dell's Web site offers a Core Solo CPU for a saving of £40 (ex. VAT), and also offers a fingerprint reader for an extra £60 (ex. VAT).

Performance-wise, the Latitude lagged behind other notebooks with Core Duo CPUs, such as the Toshiba Satellite P105-S6024 (admittedly a larger desktop-replacement system), in our iTunes and Photoshop CS2 tests. The highlight of the Latitude D420 was its battery life -- at 7 hours and 8 minutes (with the larger 9-cell battery), that's 3 hours more than the Lenovo 3000 V100, a similarly configured ultraportable Core Duo system.

The basic warranty on the Latitude D420 is Dell's three-year next-business-day on site service, which includes lifetime phone support. A variety of upgrade options are available, including access to Dell Business Support phone and a training package for £49.99 (ex. VAT), accidental damage cover for another £99 (ex. VAT) and theft replacement for theft for another £100 (ex. VAT).


Packaged Quantity 1
Platform Technology Intel Centrino Duo
Notebook type Ultraportable (Under 4 lbs.)
Processor / Chipset
CPU Intel Core Duo U2500 / 1.2 GHz
Number of Cores Dual-Core
Cache L2 - 2 MB
Power Efficiency Ultra Low Voltage (ULV)
Data Bus Speed 533 MHz
Chipset Type Mobile Intel 945GM Express
Features Enhanced SpeedStep technology, Execute Disable Bit capability, power-optimized processor system bus
Cache Memory
Type L2 cache
Installed Size 2 MB
Memory Speed 533 MHz
Configuration Features 1 x 512 MB + 512 MB (soldered)
Technology DDR2 SDRAM
Installed Size 2 GB
RAM 1 GB (1 x 512 MB + 512 MB (soldered))
Max Supported Size 1.5 GB
Technology DDR2 SDRAM
Speed 533 MHz
Form Factor SO-DIMM 200-pin
Slots Qty 1
Empty Slots 0
Optical Drive DVD-ROM
Type none
Read Speed 8x
Type portable
Resolution 1280 x 800 (WXGA)
Widescreen Display Yes
Monitor Features UltraSharp display
Diagonal Size (metric) 30.7 cm
Display Resolution Abbreviation WXGA
Environmental Parameters
Humidity Range Operating 10 - 90%
Vibration Tolerance 0.66 g @ RMS (random) (operating) / 1.3 g @ RMS (random) (non-operating)
Hard Drive
Spindle Speed 4200 rpm
Type HDD
Installed Qty 1
Capacity 80 GB
Audio & Video
Graphics Processor Intel GMA 950
Memory Allocation Technology Dynamic Video Memory Technology 3.0
Max Allocated RAM Size 224 MB
Sound Speaker, microphone
Audio Codec STAC9200
Features High Definition Audio
Type keyboard, touchpad, track stick
Wireless Protocol 802.11a/b/g
Wireless Controller Intel PRO/Wireless 3945ABG
Wired Protocol Gigabit Ethernet
Optical Storage
Drive Type DVD
CPU Type Core Duo
Processor Number U2500
Manufacturer Intel
Clock Speed 1.20 GHz
Floppy Drive
Type none
Capacity 42 Wh
Cells 6-cell
Technology lithium ion
Run Time (Up To) 4.6 hour(s)
Card Reader
Type card reader
Supported Flash Memory SD Memory Card
AC Adapter
Input AC 120/230 V (50/60 Hz)
Connections & Expansion
Slots 1 x memory (0 free)
1 x PC Card (1 free)
1 x Smart Card (1 free)
Interfaces 2 x USB 2.0 4 pin USB Type A
1 x display / video - VGA - 15 pin HD D-Sub (HD-15)
1 x modem - phone line - RJ-11
1 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45
1 x microphone - input - mini-phone 3.5 mm
1 x infrared IrDA
1 x docking / port replicator
1 x audio - line-out/headphones - mini-phone stereo 3.5 mm
1 x IEEE 1394 (FireWire) 4 pin FireWire
1 x PoweredUSB 2.0
1 x display / video 24+1 pin digital DVI
Memory Card Reader Yes (SD Card)
Brand Dell
Product Line Dell Latitude
Model D420
Packaged Quantity 1
Compatibility PC
Platform Technology Intel Centrino Duo
Notebook Type notebook
Platform Windows
Hard Drive Capacity 60 GB
Diagonal Size 12.1 in
Max Transfer Rate 56 Kbps
Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11a, IEEE 802.11b, IEEE 802.11g
Wireless LAN Supported Yes
Wireless NIC Intel PRO/Wireless 3945ABG
Features hard drive password, security lock slot (cable lock sold separately), system password
Dimensions & Weight
Width 11.6 in
Depth 8.3 in
Height 1 in
Audio Output
Compliant Standards AC '97
Manufacturer Warranty
Type 3 years warranty
Data Bus Speed 533 MHz
Chipset Type Mobile Intel 945GM Express
Physical Characteristics
Weight 3.09 lbs
Min Operating Temperature 32 °F
Max Operating Temperature 95 °F
Operating System / Software
OS Provided: Type Windows XP Home
Type Cyberlink PowerDVD, Drivers & Utilities
Video Output
Graphics Processor Intel GMA 900
Graphics Processor Series Intel GMA
Video Memory
Memory Allocation Technology Dynamic Video Memory Technology 3.0
Max Allocated RAM Size 224 MB
Service & Support
Type 3 years warranty
Service & Support Details
Type limited warranty
Full Contract Period 3 years