I'm having fun because, exclusively use solar energy for my smartphone, I have two handy yet powerful solar panel, to which I have connected a respective Wentronic PowerBank. In this sun are in a few hours fully, with clouds, it takes two or three days, but the Wentronic PowerBank invites even behaved while other brands invite you to part only in full sunlight. I have therefore always three power banks in operation, two are charged just by the sun and one I have with me for charging smartphones, its battery now after two years already has its best times behind itself and must therefore be loaded unfortunately twice daily. Here Wentronic PowerBank done good this task, with a full charge Power Bank I can charge my phone twice, The Power Bank is small, handy and especially stable and resistant. I had read quite a few other brands, where after a few months of daily use, a predetermined breaking point has emerged. Just me one of these competing brands (Revolt) broke down again - super annoying. But I try again with another brand (simply because I like to try different), if this goes again to break but I will only use the repentant Wentronic, with whom I had never been in trouble.
Addendum: ********* I was surprised a few days ago by the storm, my two Wentronic were gossiping wet ... and did it first, of course not. But after they are dried - hard to believe but true, both working again !!! So much for robustness and reliability ...
