Where can I get a genuine or atleast reliable stock or slim battery for the g3? Went to amazon and saw some people saying it didn't work, battery life was horrible, phone shut off because of fake battery, etc. I got my g3 from craigslist (as I do most my phones) and it came with a 6500mAh extended battery which is great (I mean its outstanding) but I wanna get the stock look and feel. Also a battery door with nfc. I have the att version so ik qi charge wont work but I want nfc for payments. If you could please attach a direct link so I can purchase.