solar charger for iphone 3g/3gs/4g 
0.66w solar panel 17%efficiency 
Charging time: 2 hours 
Standby time: Up to 230 hours

Solar charger for IPhone 3G/3GS/4G,

 

Charging time for the mobile phone: about 90min
Charging time for the Lithium polymer battery inside using USB charging cable :

about 1.5 hours
Charging time for the Lithium polymer battery inside using the solar panel:

10-15 hours