... indication for batteries YF-P37 Pulldown Solar Panel Mobile Phone Charger: Technical Parameter: 1.Solar panel:5. ... voltage:5.5 V5.Outpit current:400 mA 6.Charging mobile phone is about 4 hours. Solar charge for ... built-in battery is about 6-10 hours. Computer ... 7,LED indication for batteries .8,Suitable for mobile phone ,digital camera ,PDA,Mp3,Mp4, IPOD,DV ...