The positive energy charger is a device that converts solar energy into electric energy. It is stored in the battery after converting solar energy into electric energy. The battery can be any kind of electric storage device, which is generally composed of three parts: solar photovoltaic cell, battery and voltage regulating element.

The battery is mainly lead-acid battery, lithium battery and nickel hydrogen battery. The load can be digital products such as mobile phone, and the load is diverse.