Link: http://technogog.com/review/review-of-treqkr50-solar-charger-5000mah-portable-power-bank/
Quote:
"I’ve reviewed a lot of portable power banks or portable batteries and most are the same, but some are different like the one I today which is solar powered, or it can be powered by the sun. There are many of these out there and this one works just like all the others. The Treqkr50 is a 5000mAh power bank with a secondary solar panel built-in so in an emergency you can power your phone by the sun. It works fine, read on to learn more… "