Proper Power

At a svelte 11.5mm (0.45 inches) thin and weighing in at just 145 grams (about 5 ounces), it’s hard to believe that Proper Power is rated as high, mAh-wise as it is. Its 9,000 mAh reserve can recharge your smartphone about three times over, and fast, thanks to a 2.1Amp output. Use it with any USB charge cable to refuel just about any device, then recharge the Power itself with a Micro USB when it’s running low, indicated on its four-LED gauge.

Find it at Proper – $40