Have seen many benchmarks comparing a PentiumM (or Core) with a CeleronM and the lack of speedstep by the celeron translates in about 30-40% less battery life. AMD mobiles are known for consuming more power but what about a 1.8 G Sempron with C'n'Q compared to a ~1.4G CeleronM? The sempron idles @ 800MHz vs 1400 of the Celeron. Anyone has got an Idea?!