The Powertrekk is the first mobile charger that runs on ordinary water. Charge your phone and electronics anywhere,anytime. All you need is water! This is how it works: The Powertrekk requires a “PUKK” . You add a small amount of water to the device and the Power PUKK begins to separate the hydrogen from the water using it as fuel to charge your electronics. The PUKK is a onetime use deal and produces enough power for one full iPhone charge. Each PUKK will be $4.00. You also have the option to charge the internal battery prior to being off the grid so you can power items later.