Battery life is one of the most important things to consider, especially when buying a more compact, portable model like the Gigabyte P35K-CF4 UltraBlade.
Traveller. I watched movies wearing headphones with screen brightness two notches from maximum until the battery died and got a battery life of 4 hours 10 minutes. This is a decent figure
Business use. I turned the screen to half brightness, enabled wireless and then looped PC Mark 8 which gave a figure of 2 hours 58 minutes. That is constant heavy use so in the real world it is safe to double the figure to six hours.
Gamer. This was fun, playing DIRT 3 at Full HD with Anti Aliasing. The battery lasted 73 minutes before the ‘battery low' warning interrupted things. I would prefer to see a figure closer to two hours but cannot really complain about the P35K on this score.