I have been lately reading this new blog about Tablet PC, specifically about the Toshiba M400 which is advertised by Toshiba with a battery life of more than 4 hours when the real life test shows a little more than 2 hours.
One of the funniest thing I find is that the "specialized" press has criticized a big time the battery life on UMPCs. But they have forgot that at this moment you wont find out there probably more than 2 or 3 Notebooks, subnotebooks or Tablet with a battery life higher than 3 hours.
It's a fact. We just are not that good with batteries yet. There are many things that need to be changed to get a battery life higher than 4 hours and all these things that need to be changed if you put them together in a Ideal machine, it will cost you a fortune at this moment.
are we going to see 4 hours, 5 hours or more in our mobile machines? Yes, but not this year. We still far away from having this technology cheap enough to have it as a common thing in all mobile technology.