I have two Wurrkos (TS30S and TS25) with USB power bank features. They work for charging an older iPhone when using a USB-to-Lightning adapter, but I can’t get them to charge multiple other devices (other phones, ipads, portable wifi station, etc). I see the Wurkkos HD20 had issues, anyone have any tips for getting these other Wurkkos working?
My best guess is that these Chinese companies do not follow the USB charging specification.
The USB logo means a company conforms to the USB spec. We take it for granted but it means something.
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