ok I just might be me. but I figure I tell my story. last night I did my fantasy football draft. it lasted 4 hours. anyways I used a fantasy football app as my cheet sheet. the phone was on for 4 hours straight. I went into setting/applications/devopment and checked keep screen on. anyways of 4 hours of use my phone lost 20% of power. It never lasted that long before that I noticed. Might be just me But someone else check if this works for you.