It's reasonable that when a machine has a tiny battery, it'll have tiny battery life.
Did you get the giant battery that sticks out the back/bottom of the machine an inch or two, or is it the battery that's just about the size of 5-6 AAAs?

Other than that, it looks like a great little machine. When they first came out I gave getting one a bit of thought, it's about as much power (in a higher end one) as my ThinkPad R61i, in a much smaller package.

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