I checked some reviews, but no one mentioned this problem I think. Are you referring to the version with N4200?
The reviews I have seen talk about a good battery that can easily reach 6 hours, but mine lasts only 3 hours because of this problem.
Anyway, is there any way to solve it by updating drivers or something like that? Does it seem to be a software problem or something more complicated?
35$ is so worthless if I need to keep an item with half battery life than expected.