Some ultra low voltage processor models get around 10hrs of battery life as well. The Asus UL series get really good battery life, at least under Windows. I ha

Some ultra low voltage processor models get around 10hrs of battery life as well. The Asus UL series get really good battery life, at least under Windows. I have a UL80vt running Ubuntu 9.10 and get around 5hrs on that with the screen at full brightness (b/c brightness control only works with reboot). It also uses the nvidia dedicated graphics afaik (it has hot-switchable dual graphics under windows).