The solar function works, however, is what kind of patient one.
I had the vacation time for a while no electricity and had to provide flashlights and other small items in order.
If it was during the day in the sun it was full in the evening.
For camping trips in sunny areas than adequate for two small flashlights and maybe a radio or whatever else this has to charge every night.
Somewhat smaller capacity than other Power Banks to the price, so if you expect a recommendation for this time where to reside where no current flows.