Batteries that can run 10 times more

Using laptop in battery mode is painful which is the power will out in 2 hours (i guess). So a student in Stanford University have doing some homework to come out with redesign rechargeable li-ion batteries using silicon nanowires. The result, the batteries have 10 times more longer than current one.

Report says that a laptop that runs on that kind batteries can operate for 20 hours. So after using it can we at least recharge batteries once in a day? For more info head over to this page.