Performance-wise high-end Dothan similar to high-end P4. Cheapest, Deleron all the way. Battery-wise Dothan spanks all, and comes back for seconds. My Dell D800 (Banias 1.3GHz, precursor to Dothan) on boot, while idling and with a fully charged 1½ year old battery shows 4 hour battery life left. Worked on a brand new Dell 9100 with a 2.8GHz P4. Fresh boot, idling CPU and fully charged new battery shows 1:50 battery life. Start doing stuff and battery life drops to 1:20. My Banias will drop to about 3:30.