... silicon portable solar charger Technical Parameter1.Solar panel:5.5 V,3W 2.Solar conversion efficiency ... about 7-10 hours. Function Brief 1,Intellectual charging function: precharge,constant current charge ... different digital products.7,LED indication for batteries .8,Suitable for mobile phone ,digital camera ... ,PDA,Mp3,Mp4, IPOD,DV etc digital products.9,Charging time(with ...