I'm holding out for a 1800mAh battery, which is the highest I think they can go and still keep the stock battery door. I search the internet daily looking for one, with no luck. The first person to produce one will make a lot of money, cause I know I'm not the only one that wants/needs the extra juice without the bulk and added weight to an already hefty phone. To me, 1600mAh is not much of an upgrade and definitely not worth the price, IMO. *Keeps searching and hoping*