A look inside another solar USB power bank.

I bought another solar powered USB power bank on eBay to see how the capacity and circuitry compared to the previous one. Interestingly this one had a marked chip in it that even yielded a (Chinese) data sheet.
http://www.sz-hxdz.com/uploadfile/pdf/201601181142572979.pdf
Notable things about this unit are the 2400mAh cell (supposed to be 5000mAh), 1A total output between two sockets and overcharge protection on the solar charging as well as the USB charging.