In all honesty, smartphone users do not need expensive replacement batteries or solar panels, which are useless in most climates. People are too lazy to constantly turn generator cranks, but they want to have a free source of energy anywhere and anytime. HandEnergy startup is an attempt to solve this problem.
Inside the apple-sized case are the rotor, stator, 1000 mAh battery, USB controller and Bluetooth module. The user needs to twist the gadget around its own axis and maintain rotation with stingy, effortless movements of the hand and forearm. The mutual movement of the rotor and stator generates an electrical current that is fed to the battery or to an external connector.
HandEnergy delivers an electric current of 5 V and 1 A, the process is controlled via an application on a smartphone via Bluetooth. The functionality is deliberately simplified to a disgrace, in order to bring the gadget closer to hand-held exercise equipment, like an expander. Or toys for the development of motor skills - with their help it is more fun to while away the time in traffic jams or the subway. Easy, intuitive use.
The startup has successfully raised over 60% of the required investment and the generators are likely to go on sale in May 2017. The cost of one copy starts at $ 85.