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Has this guy somehow not learned of type A to type C cables?
It's not so much the connector; but the power delivery standard.
Type A maxes out at 5v 3a = 15w and is often limited closer to 5v 1a = 5w for public-use charging ports.
Type C and its power delivery standards can get as high as 50v 5a = 250w (though usually closer to 20v 5a = 100w)
Then again.... The negotiation for what voltage/amperage to supply happens over the data lines which you don't want connected on a public charging port...
I dont really see a good solution here.
Carry a power bank.
Yes, obviously that's always been an option.
I dont see a good solution for the topic we were actually talking about: creating high-power public use charging ports.
Charge the powerbank with the public charger. No data to steal, no expensive phone with sensitive electronics to break.
One day, I'm sure there will be a defcon talk about reprogramming powerbanks to fry devices.
The same could be said about power adapters
Of course they have heard of those cables. They very likely own a few themselves.
It would be nice to only have to carry a single C-C cable in your bag though.