Battery capacity has proven to be a serious barrier to true mobile computing. Tim Dean looks at how the technology is evolving.

From budget laptops to ultra-tiny netbooks, ultraportables and high performance, we explain the tricks to finding out the ultimate laptop at the right price.

What can a vendor-controlled comparison of notebook technology teach us? Plenty – but not in the way it was intended. Read on as we expose HP’s notebook ‘Reliability Challenge’.

Battery Extender claims to offer 30 per cent boost.

How easy is it to replace a battery? Ty Pendlebury investigates when internal batteries can cost you a trip to a service centre.

The bad news is that Sony says these sexy 11.1in Vaio TZ laptops are at risk of overheating. But there is something about Sony's Vaio laptops that should make you happy.

Its longlife 24-hour battery makes it significantly less portable, but this laptop is classy in every sense of the word.

Almost a year on the issue is still burning.

Is it possible to run all your electronic gadgets - even your laptop - on renewable energy sources? PC Authority's eco-warrior Matthew Sparkes gets on his bike.

The price war among Netbooks and mini-notebooks is hot at the moment, especially leading up to Christmas. We source the best prices from around the net this week.

Wondering which netbooks have the best battery life? We've pulled together a big chart showing how 25 different models compare

If you want a longer lasting battery, you'll have to cough up. We've learnt that the cost of upgrading from the standard 3-cell to 6-cell battery option will cost an extra $169 on the HP Mini 2140.

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

If you're in the market for a new laptop, one of the most important, and tricky considerations is battery life. We've bench tested 10 ultimate laptops in our latest issue, and here are the results

We tested the battery life of twelve of the latest smartphones, including the iPhone 3G, Blackberry Bold, Nokia E71 and two HTC models.

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

Can’t decide between an Eee and a Wind? A Mini note or an Aspire One? Believe it or not, there’s a bunch of old school smaller laptops that may do the job for less money. We took a look at 7 old school ultraportables.

Research institution MIT are well on their way to developing one of the world's most sought after electric vehicles: a car with 320km range, 161 km/h top speed and a rapid recharge system that takes just 10 minutes to charge.

Hybrid device combines advantages of capacitors and alkaline batteries.

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