Ok Guys I have a weird one for ya....I posted in some other forums, but note sure what to do. A few weeks ago, we moved our office to a different part of building, where its a real deadzone. Even on wifi, and mobile data turned off, battery life has been horrendous. Looking back, it seems during my move, I also upgraded from Eclipse 2.1 to Liquid ICS around that timeframe. So I back tracked and installed eclipse 2.1 and tested. Here are my findings: on Liquid ICS 1.5mr: In deadzone in my office, with wifi turned on, mobile data disabled, I get barely 1 hour per 10% Everywhere else, 4g/wifi mixed. More wifi, the better, but I get roughly 2.5 hours per 10% I re-flashed Eclipse, this is what I found on Eclipse 2.1 In deadzone in my office, with wifi turned on, mobile data disabled, I get approx 2.5 hours per 10% Everywhere else, 4g/wifi mixed. More wifi, the better, but I get roughly 2 hours per 10% Overall, the ICS battery usage seems to be much better under normal conditions. In a deadzone, seems to eat away much more battery, even when mobile data is disabled. I'm geussing that its prob checking for a tower much more often then GB? Any help would greatly be appreciated.....Thanks!