Hello There, I recently a bike ride behind me and was for this solution from the current to be grateful independently but can nevertheless have the navigation device and cell phone constantly in use. Clear: Condition is of course sun. I have the solar panel on my Rack Bag System stretched (the large holder holes were very helpful). In order for a 30000mAh power battery was charged and this has then to load mobile phone / navigation while driving. Thus one comes loose 5-6 days with continuous use of the device without requiring an external charge of (sun provided).
Note: Do not connect While driving the solar panel directly to the phone! Do not worry ... is nothing broken! But unfortunately you drive once briefly by shaded areas, and then naturally falls short of charging current path. The mobile phone - at least most - acknowledge this by Displayanschaltung and / or sound signal. This can be annoying in the long run. Therefore: Always a buffer between battery pack.
