Energi 5K+ is only slightly taller and wider than an iPhone 5/5s in a large case, such as OtterBox’s Preserver. It’s just about as thick, too, at 9/16”. That makes it small enough that it should fit in many pockets, and almost all bags, without being obtrusive. Of course, there’s a micro-USB port for power, and the cable comes with the battery pack. There’s also a USB output, which is actually pretty uncommon…
