Battery Life on Thinkpad X220

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http://crunchbanglinux.org – Hi,I'm using Crunchbang Waldorf (awesome work) since september and I think it's really more confortable than Win7. But my laptop seem warm and the battery life fallto 3h00 (instead of 6h00 on win7). I don't know how to stop bluetooth from start.I tried to configure laptopmode but battery life don't change.If someone have the same problem :) (HowTos)