I purchased a new Droid Maxx on 8/23/13. Within a few days, it was power cycling on its own on a regular basis, sometimes once a day, sometimes multiple times a day, including one day for 20 minutes non-stop. I returned it and received a replacement last week (the 17th I believe) and it is now doing the same thing, it started within 24 hours of receiving it. I have done a soft reset, and am currently backing up my photos so I will have them when I do a hard reset, as they suggested. They have also suggested installing 1 or 2 apps at a time to see if it may be an app issue. Does anyone else have this problem? I am thinking we may be able to compare installed apps to see if we may have some of the same ones? I love this phone, and the amazing battery life, but this is driving me crazy! Thanks!