This product is converted into electrical energy through the photoelectric conversion equipment, the principle of solar charger is: through the photoelectric conversion plate will be converted into electrical energy and stored in the built-in lithium battery capacity, and then through the control circuit will be built-in lithium Battery power through the output to the phone, digital cameras, MP3, MP4 and other digital products charge, the solar charger in the case of long-term no sun, you can also through the electricity (AC100V-240V) to the built-in lithium battery charging, In the travel, travel, long-distance travel boats, field operations and other environmental backup power.