Long battery life is the oft-touted but rarely fulfilled specification for many a laptop. But now Acer has delivered on the promise with the Acer Aspire Timeline 5810T, a thin and lightweight but usefully powerfully 15in notebook.

The Acer Aspire Timeline 5810T is slightly wider than 15in in fact, as it uses a new-style widescreen display that measures up at 15.6in in its 16:9 ratio. This glossy panel is bright and cheerful enough, colourful without being as oversaturated as some panels we see.

The Acer Aspire Timeline 5810T chassis is finished in a dark metallic grey, a plastic construct but nevertheless a sturdy feeling one - and all helping the 5810T to keep the weight down to around 2.3kg.

Despite packing a six-cell battery into the Acer Aspire Timeline 5810T to aid long life, this is not an unsightly afterthought hanging off the back, but neatly integrated within the footprint of the case. In our MobileMark 2007 Productivity battery test, the Acer Aspire Timeline 5810T lasted a long 9 hours 13 minutes (553 mins).

The generous power pack is only part of the story though, as Acer has armed the Acer Aspire Timeline 5810T with a low-voltage CPU in the form of the Intel SU9400. This is the same 1.4GHz dual-core processor found in costly ultraportables such as the Dell Adamo and Samsung X360.

In running gear, this Acer Aspire Timeline 5810T can notch up several facilities you wouldn't necessarily find together on an executive thin 'n' light design - notably an integral DVD±RW Dual-Layer optical drive able to burn to dual-layer discs, plus a multi-format card reader, four USB ports and gigabit ethernet. There's even two video output ports, HDMI and VGA.

Our Acer Aspire Timeline 5810T sample came fitted with 4GB of fast DDR3 RAM and a 500GB hard drive; although we couldn't find anyone in the UK selling this notebook with anything larger than 320GB. You could fit a larger drive yourself, of course, and the Hitachi 5K500 we found ready-fitted will set you back around £90 if bought from somewhere like Dabs.