Meet the Uvolt Watch: a beautiful solar watch that uses a solar panel to passively capture energy from the sun and store it in a removable power module. You can use that to recharge your smartphone when it is low on battery. The power unit will be compatible with iPhone and Android smartphones.
The developers are also including a fast charging dock for it. Each power unit has its own wire, so no need to take additional cables with you. The Uvolt Watch looks elegant and weighs only 110 grams.[where to find it]