So my battery life was pretty poor, i'd be lucky to get 5-8 hours with minimal use and playing around with 4G on occasion. I tried my wives Hero battery to see if it made a difference.. it didn't seem to. So after her phone charged my battery up I swapped back. Now with normal use, playing music with it in the car, browsing the web on occasion, doing speed tests 3G/4G, couple hours of phone calls, some games, messing around with the LEDs as a flash light i'm still at 30% with 1 Day 4 hours unplugged. What the heck happened with her phone charging my battery!? What an improvement! I made no other changes on the phone besides that. I'll see if after my own phone charges the battery if this lasts or if perhaps there is an issue with the phone charging the battery. Pretty odd, just thought i'd share and see if anyone has any ideas what could be happening.