In this paper a novel system is introduced as combination of state of the art in the field of wireless power transmission and mobile robotics. A mobile robot is equipped with wireless charger and navigates in the environment of various battery nodes in order to charge the network in an efficient way. The presented research in this paper illustrates design and development of real functional system with the aim to change the traditional way of carrying the battery to charger into navigating the charger to batteries. Even though some theoretical research on this field was available however the working prototype has been not developed yet hence we focused on the practical application and brought the concept into practice. We initiated the research by reviewing the existing wireless power transmission technologies and later on equipped mobile robots with QI standard compatible WPT. The complete prototype architecture from both the hardware and software aspects is presented in this paper. We believe such architecture can be a useful testbed for bringing such technology from theory to practice.