The smart battery case is engineered specifically for iphone 6s and iphone 6 to give you even longer battery life and protection the soft microfibre lining on the inside helps protect your iphone while the soft elastomer hinge design makes it easy to put the case on and take it off again on the outside the silky soft touch finish of the silicone exterior feels great in your hand charge your iphone and battery case simultaneously for increased talk time up to 25 hours internet use up to