The
X100e that we reviewed last year only managed around 2.1 hours of life,
while the X120e (both using a 6-cell battery, while the latter has AMD's Fusion APU under the hood) managed around 3.5 hours
in the same test. But those are just to provide perspective; our dm1z here managed just over four hours of use. We have seen reports that this machine will last even
longer if you disable Wi-Fi and go easy on the screen brightness, and we
believe it. Either way, over four hours when in use constantly is pretty
impressive, and it matches (or beats) most other netbooks on the market today. Plus, you're getting an enhanced level of performance with Fusion; finally, performance that doesn't compromise when it comes to battery life.