Battery life is turning into a major selling point, as we discover when we tested Toshiba's new mini NB100 netbook.

Small enough to fit in your pocket but with enough power to make light work of rusty screws and flat-packed furniture

While many ultraportable laptops, like the Toshiba R200 go all out to get size and weight to an absolute minimum, a great deal of usability is often sacrificed – the X505 is impractically small for constant daily usage while the R200 has limited battery sizes.

Dell has waited several years to release its own PDA, and now committed to Pocket PC, Dell's main weapon is aggressive pricing that's on the verge of insane.

Incredible design and amazing battery life makes the G118 a tempting mobile option.

Small but perfectly formed, the D420 has hours of battery life and loads of features and great ergonomics.

The Toshiba e740 Pocket PC is the third PDA from Toshiba released in the past year, and is targeted at the business user. This does not mean its a bland PDA, as it is the fastest on the market thanks to its 400MHz Intel Xscale processor.

Sony does it again with a Notebook to die for.

With new, supercharged battery life, the new iPods offer superb design and performance. But compatibility caveats remain.

A capable and beautifully designed smartphone, but weaker battery life means it can’t match the E71

An improvement over the Eee PC 900, with longer battery life and sleeker looks – but its rivals are catching up

Despite some odd feature choices, this is an affordable powerhouse of a laptop. A great value mid-range Centrino 2 laptop, as long as you're not worried about battery life.

You've seen our first impressions, now here's our full review. Good-looking, usable and keenly priced but, for now at least, poor performance and battery life give the Eee the edge

With solid-state media still expensive and offering limited capacity, MP3 players with hard disks seem like the perfect solution.

It's a sign of the times when Compaq's Aero 8000 runs Windows CE in a box bigger than a Sharp PC-A250 (reviewed issue 23, p86) running Windows 98. So what's the big idea? Windows CE uses no moving parts, while software in ROM means immediate start-up times, high reliability, and long battery life all highly desirable qualities in a portable.

Acer’s Aspire one makes a splash. A great keyboard, a fine screen and a keen price make for a superb mini-laptop

Classy looks and light weight make for a fine ultraportable, but it’s got some tough competition.

Rechargeable battery breakthrough good for your wallet and the environment.

Beautifully designed with excellent battery life and generous features – but it’s expensive.

Excellent audio with a cool factor.