RE: SP3 i7 512: The unit went from 100% battery charge to auto-shutoff this afternoon in 1:10 or less (I found it off when I returned from a trip at lunch and it showed 5% battery when I plugged it in and rebooted). When I left my desk: it was wi-fi connected. The only open program was IE. Screen was at 100%. The fan was running when I left (as it had not turned off since the machine was booted up this morning). Anyone else having these severe battery drain issues? (It is a great machine - but useless as without battery life).