Samsung needs to make a battery case for the next line of galaxy phones. They already got the silicone and leather cases.
They have many other very nice cases. I don't know, battery cases don't seem to be as popular anymore since modern phones have much better battery life.
Well my Galaxy 7 ,witch is full runs out very fast and takes a while to charge and mostly have to turn it off to charge and it is basically new.when it's down to 20% better be looking for a charger