I'm still holding out for Mugen Power to make a back case compatible with the American G Pro. I don't wanna lose the ability to use wireless charging, just too convenient of a feature.
I have this 2 battery/charger combo. Works great. The charger has a USB port so you can charge your phone and one of the batteries with it at the same time. Still works with wireless charging.
Zerolemon`s discounts are lovely I used LG for a week, it was the smartphone of a friend, trying to sell it to me, but I`m sure a Zerolemon external battery would boost its performance