In the sun, the principle of solar cell phone charger is to convert light energy into electric energy and store it in the built-in battery through the control circuit. It can also directly charge mobile phones or other electronic digital products with electric energy generated by light energy, but it must rely on the luminosity of sunlight. In the absence of sunlight, it can convert alternating current into direct current through the control circuit and store it in the built-in battery.

Its main purpose is to reserve batteries for going out, traveling and climbing mountains. It can be used for charging mobile phones, mp3, mp4, psp, gps, digital cameras, portable audio-visual equipment, etc.

Extended data

The larger the area of the solar panel, the more sunlight it absorbs and the faster the charging speed. It is recommended to use a folding solar charger, which is convenient to carry. In addition, the intensity of sunlight will also affect the charging speed.

The conversion efficiency of received light energy into electric energy and electric energy are different concepts. At present, the average electric energy conversion rate of solar products is about 15%, that is, solar panels absorb 1000 watts of energy, and theoretically the converted electric energy is about 150 watts, provided that the conversion equipment is qualified.

Baidu encyclopedia-solar charger