myPower is a running companion that clips to your hip and captures your kinetic energy as you run. myPower stores this energy so you can use it to charge your smartphone or other mobile device later in the day. In essence, myPower is a rechargeable battery that you never have to worry about recharging--as long as you keep running. Forty-five minutes of running with myPower can give your iPhone an extra 7 to 8 hours of battery life, and running with myPower for a year can offset the carbon footprint of itself and the device you charge with it. At about the size of a small cellphone, myPower is comfortable, stylish, and can be worn when biking or walking as well.