FWIW, I have also had decent experiences with Anker powerbanks. Less so with dynamo hubs, having used both SON and SP, my conclusion is good for on-road, or fast gravel, but very disappointing on extended off-road trails, and that's before you factor in vulnerability to failures. And on Alpine routes with extended climbs, the lack of output on the long slow climbs is not compensated on the short fast descents.
Asposium wrote:
Dual inputs for up to 4A charging (2A per port). So, about 20W input.
How does that work - do you take two input cables and plug it into two domestic electricity sockets simultaneously?
Does anybody know of charging devises (such as the Mu) or powerbanks that will 'fast charge' the iPhone 8?