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solar energy panel
Solar backpack is a new kind of solar charger, it can absorbs solar energy through solar energy panel and then turns solar energy into electric energy to charge for brand handset (NOKIA, SAMSUNG, SIEMENS, MOTO) or other digital equipment (digital camera, PDA, MP3, IPOD) and so on. If there is no sunshine for a long time, just change another battery which is full of power (such as disposable dry cell) or charging the electric power storage box by using the city electricity.
The charging time of solar bag is short, it can be used both as a backpack and a charger, no wonder, it would be very convenient to your life time.