Does my Sony Xperia Z2 with good sun exposure in the morning at 10.00 clock with about 900-1000 mA. Finally a good charging ability for extensive cycling tours with longer retention in a place with no outlet. Additional batteries are well and good, but at some point at the end, so solar. My full recommendation for this solar charger, which allows you to load the mobile gadgets even when something cloudy sky! --- Update 10/06/2014 In case of heavy fog cloud cover, the solar power decreases as expected. In my case, the Sony Z2 with magnetic charging cable of iProtect to about 200-400 mA. Once the Bewölkungs or veil Cloudiness phase has been overcome invites the Z2 continue without snags. Since this is the case for all solar panels, which is not to refer to as a blemish. For Iphones it may be less successful suitable for charging without buffer battery, as these need to be reconnected in charge interruption to the initiating charging. Also have ordered Portapow USB multimeter provides here good service to control the voltage and charge currents. --- As I have already bought some solar panels to power small mobile devices that should remain reasonably portable, and was often disappointed this panel by far the best. The specified output of 11 watts the panel is probably just under desert conditions or other optimal solar radiation. ---