Waterproof 8000mAh Portable Solar Charger Dual USB Battery Power Bank
A part of the review has been auto-translated.
https://www.banggood.com/Waterproof-8000mAh-Portable-Solar-Charger-Dual-USB-Battery-Power-Bank-p-1615588.html
Arrived, good price, good quality
10
takes many days to charge in sunlight, for a tropical climate