At least in my case. I've done everything from turning off unnecessary functions to setting up my phone from scratch, with the same disappointing results: 3hrs or so of usage in one charge (this is with LTE off). Brought my phone to the Apple Store but they claimed my battery is functioning normally despite my claims. As a last ditch effort, I went home to play with the phone more and turned off 'Set Automatically' under 'Date & Time' and charged it to full last night then unplugged it. Woke up this morning with the phone still at 100% (it normally discharges about 5% overnight). And from the way it's going this afternoon, I might be able to reach the 8 hrs claimed by Apple. Heck, I'll be happy to reach 6 hrs! I know this topic has been beaten to the ground and separate threads have been opened for it. So forgive me for opening another one. I'm just surprised and excited to let everybody know about this.