I only bought a more favorable solar charger and was totally disappointed with the cheaper. So I decided to spend a little more and have ordered this same RAVPower charger (9W). The positive list already begins with the packaging to: The packaging is soide executed, thus offering a good product protection - fully meets requirements. When unpacking you will find a manual that is written in several languages and all the necessary product information holds. This, too, I got to know different with the cheaper product. Thus, here meets all the requirements. The processing of the product is really good - even if individual stitches are not quite straight and the eyelets are not sewn evenly. These are just purely visual things that do not detract from the functionality and not cause for me to point deduction. On the first sunny day after receipt of the charger, I've tested it a bit and could quickly find that even with an unfavorable orientation to the sun and a window pane between the charger and sun at least as much sunlight ans RAVPower came that much electricity was produced that the battery has nevertheless not emptied. I tested it. With a Samsung S3 mini, with enabled BT, WLAN and GPS I look forward to the summer, if I can then load my phone via the solar charger. The size and weight of the device let me hope that I have a faithful companion for cycling have in the summer, which supplies my S3 with power, so I can use it as Navi. Very positive way, I find that to match the 4 eyelets and 4 snap hook are included. So you can attach to almost any backpack it very simple.
I can each is looking for a solar charger, recommend RAVPower definitely.
Supplement: I have my S3 drangehängt today times at full winter sunlight mini and have after about 60 minutes to charge the battery of the initial 70% to 100%! As can still come back for more sun!