Versatility. It’s the ability to jumpstart your flat cell phone just as well as your car. Junopower’s JUMPR measures in at just under 0.6-inches in thickness, weighs 7 ounces, and houses a 6,000mAh LiPo battery that’s good for charging your smartphone a couple of times over. But when in a pinch, JUMPR outputs 12V of juice at a peak of 300 amps, enough to revive most motorcycles and 4- or 6-cylinder automobiles using a set of proprietary jumper cables included in the kit. It goes without saying that it’s also far smaller and lighter than most battery jump start kits, making it a hell of a lot more likely that you’ll have it on you when called upon, even if it’s not your car in need of a boost.