Testing power usage on Haswell Ultrabooks is difficult due to the huge range of scenarios that the next generation Ultrabooks have. They’ll stream music for days and yet if you try to do too much gaming on them, you might be out of juice in as little as two hours. What we can say though, without a shadow of a doubt, is that the battery life on Haswell Ultrabooks, compared to Ivy Bridge Ultrabooks is hugely improved. We’ve got a Dell XPS 12 with Haswell here that proves it.
