got my mbp 15 i5 last week, ive been testing my battery, already recalibrated and all that.. i get 8+ hours on full charge on idle.. pretty average on normal use, around 5-6 hours.. anyways so while i was testing my battery, i decided to unplug my usb broadband modem to see how much battery it's draining from my laptop. but to my surprise my battery life went down from approximately 3 hours left, to 2 and half ! i even waited 5 minutes so it can properly calculate it, but it didnt increase. so my question is wuzzup widat?! shouldnt it be the other way around? i was planning on canceling my wireless broadband contract when it expires and just wirelessly tether my newly jailbroken iphone via mywi for internet access, but its seems like wifi is a minus on the battery, but usb modems are actually a plus. any thoughts? anyone else experience this?