Building a solar powered phone charger?


building solar powered phone charger , don't know kind of solar panel need. how many volts , watts need? work few solar panels garden lights put together? if not can buy solar panel. please give me information can because new of this. thank you

i building solar powered phone charger , don't know kind of solar panel need. how many volts , watts need? work few solar panels garden lights put together? if not can buy solar panel. please give me information can because am...


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