It wouldn't surprise me if this was a dual charge device, manual charge via conventional methods, then the solar cells supplementing the charge during the day, perhaps a good idea, but it does smell of gimmick... Lets face it how many of us leave our phones out charging all day? mostly were walking about with it in our pocket (or purse) trying to remember to leave it face down in sunlight every day isn't going to work to well in the real world, will just mean more dead time or worse sill more lost phones