NOTE: I have contacted the shop and they say it comes with a 3 cell battery, making the 6 hour claim very unlikely...
EDIT: Have now had another email from them saying it has a SIX cell battery.
Powered by an efficient Intel Celeron processor, the Inspiron 11Z runs for up to six hours without a recharge, making it ideal for anyone who spends a lot of time away from a desk doing their computing on the move. The 11.6 inch High Definition screen displays images in stunning, razor-sharp detail and makes watching movies a real treat. With a 250GB hard drive, you will have sufficient space to store all your media and files. There's enough room for hundreds of movies and thousands of songs and images. Getting online is so easy; use the speedy Wi-Fi internet connectivity. The 11Z is primed with the new operating system Windows 7, which will let you make the most of your laptop and keep it running smoothly. Windows 7 lets you customise your computer, set up a home network between your WiFi enabled devices and let you watch, play and record TV.
Processor Intel® Celeron® (ULV 743, 1.3Ghz processor, 1MB L2 cache, 800MHz FSB)
Screen 11.6" (HD, 1366 x 768, WXGA LED)
Operating System Windows 7 Home Premium Edition 64-bit
Hard Drive 250GB
Graphics Integrated (Intel® GMA X4500 3D Graphics with up to 384MB Shared Memory)
Wireless LAN Wireless (802.11b/g Wireless)
Network Card 10/100Mbps Fast Ethernet
Integrated Webcam Integrated Webcam
Card Reader 3-in-1 card reader (SD/SDHC,MMC)
USB Ports 3x USB 2.0 ports
Speakers Intergrated Stereo Speakers
Kensington Lock Kensington lock slot
Charge Time 2.5 Hours
HDMI 1 HDMI Port
Warranty 12 Months Dell Collect & Return