Mobile devices need to be charged daily, sometimes twice a day in case of multimedia smart mobile device. There have been extended batteries available in the market which give your device few extra hours (laptop extended batteries with 5 hours and more backup time instead of regular 2 hours or so) but still you need the device charged using a wire. Future is wireless. Mobile devices are wireless. So why not charge a smart device wirelessly? Good news is, you can charge your iPhone 3G, 3GS, iPhone 4 and Blackberry (Blackberry Curve 8900) wirelessly.