My RAZR MAXX is exactly a week old, and when I first took it out of the box it charged to 100%, and after setup, when I started to actually use it, it was at 80%. Since that night, I can't get it to charge above 70%. I've tried putting it in sleep mode and airplane mode while charging it, and I've conditioned the battery. I turned the Wi-Fi off too. The only other thing I can think to do is change my charger, because I'm not using one that came with the phone, but I doubt that would do anything. Do I just need to get my phone replaced? Has anyone else had this problem?