HI, I got a SP2 256gb two days ago. Battery life is short. 98% only show 6 hours 15 minutes left. I already use Power saver, also dim the display to 30% brightness. I also set the maximum cpu speed to 50% from 100%. I turned off blutooth and auto sync for apps. I only have wifi on. I never see it show 8.5 hours. I have the latest firmware update. I also updated the intel graphic drivers. I am so scared that I have a defected SP2. I sold my SP just for the extra battery life. Now, the SP2 just giving about the same battery life as SP1. Could one please advise? Is there any way to test my battery to see if I got defective battery SP2? I have one day left before I can return my SP2. After I finish editing this post. My battery condition is 96% 5 hours 26 minutes. @_@ Can anyone please share advice on how to max. the battery life? Please help!! Thanks a million.