Notebook with long battery life

http://www.biosmagazine.co.uk/article.php?id=1836

ok, so it does not have instantOn and weighs 2.65kg ... but its the closest to a HPC with a run time of 12.5hours on two batteries.

my subnote can run for 6 hours with its two batteries... and it is half of the weight of this laptop!! so no big deal really

erm ... whoever said it was a big deal?

This notebook runs 12.5 hours with two batteries ... while yours is 6 ... hmmm ...

sorry i wasn't clear enough

my laptop is a subnote (barely 1.3 kg) hence its batteries are smaller... 2600 mAh only. if it had 5200 mAh ones (suits 2.6 kg (2 x 1.3 kg), right? ), then it would be equal to this one!

Hours.. For kilograms.. Yet another tradeoff. Now, for the ultimate tradeoff, how about days worth of runtime for just 4kg? You get a gas RC engine and couple it to a 12-watt compact NIB servomotor. 1kg. Then you feed it from a 3kg supply of petrol. It will run for a good long while churning out usable watts. The tradeoff? Your eardrums, of course...