Here's some quick notes I made monitoring my battery usage. The 700T was in Quiet Low power mode and I was using it for web, videos, audio, etc. Normal iPad type of usage. Used both Metro and desktop apps. Looks like about 6.5-7.5 hours of web usage including audio, video, etc in the low power mode. Hope that helps people who were wondering. Note: I found during this test, using the 700T as a tablet in your lap, is not the most pleasant experience due to its size and weight. The slick back & rounded edges will not stay put in any position without being held. It really needs a dock or stand, or some sort of case to prop it up on you lap and give it some resistance to moving.