Most of the time I carry a lightning cord in my bag because I just plow through my iPhone's battery. What a pain, right? But iBattz's new Mojo Refuel charging case will let me leave the cable at home where it belongs, because it comes with two extra 2500 mAh batteries.
The batteries fit easily into the back of the sturdy case, which has a lightning dock. The only annoying thing is the case pretty much doubles the weight your otherwise light device. When your phone's snapped in, it's juicing up. Mojo Refuel ships at the end of February. It costs $90, and it will keep you from being that asshole who's always carrying around a cord.