My idea is to charge your device while you’re walking. The operation is quite simple: at every step your shoes will produce, by means of piezoelectric transducers, voltage, which will be stored in a battery. Simultaneously two LEDs, one red and one green, will indicate the battery charge status (green LED on = charged, red LED on = discharged / loading). After loading the battery, connect a small cable sewn into pants battery contained in your shoes, so as to power the transmitter module FT1235, also hidden in pants. You have to put into your pocket your device with FT1236 module to reload. This project allows you to charge, in any situation, any device in renewable and clean way.