I bought this one from RAVpower

I can't find them on amazon.com either and their website gives me 404 for their canada and US resellers maybe they are discontinued product? When I try to add to cart it bring me to a russian website lol.

this one https://www.amazon.com/RAVPower-2800mAh-Replacement-Battery-Samsung/dp/B00KR9FT4Q/ref=sr_1_4?s=wireless&ie=UTF8&qid=1494790600&sr=1-4&keywords=s4+battery or the Anker are both the same price. Would you just go with the anker ?