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My powerbank just detects that it is connected to itself and does jackshit.
Just buy another one and plug them into a ring.
Just like at work: Forward office calls to your mobile. Forward mobile calls to your office phone.
Get your work done until everybody finds out and starts wasting your time again 😂
I wonder by what method it does that? put out a pulse code on the power out and look for it? Some USB cables don't actually carry the data lines through, so.
I imagine plugging a powerbank into itself just causes a short circuit. Detecting that isn't the most uncommon thing fafaik.
What about all those usb handshakes? It think it will just drain itself with heat and damage the battery slightly while doing so.
Next technological revolution will be breakers in powerbanks
There should be a bunch of tiny fuses in there
Something something ground loop detection, maybe.
You either have a ping before connecting and if you get a response don't do it. Or you send some high frequency wave additionally to the power. You can detect that signal and then stop accepting the power.
Basically like ethernet over powerlines work.
Probably just sends a number as data, and if it gets it back then doesn't charge.
You're right that some cables don't carry data, but most do and as long as the cable that comes with it does then it's going to be fine for 99% of cases.
There'll often be a way to break it like going through a USB hub, but most people aren't actively trying to damage things. I can see people wrapping the cable around it and plugging both ends in to stop them flapping about though.
Big oil strikes again!!