The Ride-a-long is a portable device bikers will run after as long as they get it. It is a pedal-powered device that converts leg power into electric power so that you may juice up your smartphone on the go. This pedal-powered charger can be easily installed onto the rear wheel axis and, as you start riding, engages a small integrated generator to charge a built-in 1650 mAh detachable battery pack. As your biking is a clean commute, so is this way of generating clean energy for your phone. It works with all USB-enabled smartphones like iPhone and other Android smartphones. The Ride-a-long is fairly lightweight and can handle rain, sleet, mud and snow.
Available at photojojo.com for $129