On the other hand as a replacement battery at home when I boot it to the socket is to very good use. Quick full, and loads very reliable. Exceptions are the older Nokia phones (several tested), although the appropriate Nokia connector is, the cell phones can not charge it. They show once briefly that it is loaded, and then it stops again.
General could be better the Anschaltmodus. It takes my set something up, it's really up to (without burning the torch) and it really invites.
Hence my recommendation: If you want a solar charger, better stay away, who