just an update, the sleep function on windows 7 is much more power efficient. i put the 2133 to sleep for 5 hours (was 100% fully charged then). when i turned it on 5 hours later, battery charge was still 100%, at 40% brightness battery calibration calculation was 4h 20min of use.
on win xp sp3, the 2133 chewed approx 1.5% of battery life every hour of sleep. seems like sleep on windows7 has very little battery effect, if i didn't know better i would say it went into hibernate if not for the flashing blue light indicator.
another reason to make the switch!



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