Anyone who launches into a rant about sh*tty chargers and backup batteries that have a mere 9000mAh capacity should be required to re-power his or her dead smartphone with his or her own two feet. So should anyone who is an overachiever or overweight. And also all geeks who like a challenge. K-TOR's Power Box is a generator fueled by a pair of pedals fueled by your leg strength. It outputs 20 watts of electricity at 120 volts, or enough juice to charge tablets, smartphones, video devices, and portable gaming devices, as its attached human (or well-trained dog) churns out the RPMs and feels the burn.
Foldable to 12" x 5-1/2" x 3-1/2" and portable at around 4-1/2 pounds, the Power Box includes both two-bladed American sockets and a universal outlet that adapts to EU, UK, and other international versions in case you want to work out, charge your camera, and travel the world simultaneously. Power Boxes can also charge multiple devices at once, such as 4 smartphones or 2 tablets.
Charge time is about the same as it would be plugging compatible devices into a wall outlet, so in addition to being a worthy addition to emergency preparedness kits, the Power Box is an ideal gift for those who enjoy hitting the stationary bike for 4 to 11 hours.