The rapid development of smartphones entails the effect that not only the development of hardware is needed but of the batteries responsible for supplying sensors. The increased resource requirements drain mobile devices' batteries faster and faster. People usually can be seen searching for opportunities of recharging their mobile devices at airports, coaches, trains, stations. In our present research we seek the answer to what the cause is for rapid drainage of batteries, how it is possible to avoid it and furthermore how recharging affects the lifespan of batteries, thus of devices too.