He bought a Quick Charge power bank and then hacked a Digispark to negotiate with the power bank to provide 12V output to Quick ... at version 4 and supports USB-C and USB-PD hardware such as ...

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This is because not all USB ports are created equally, and those fitted to cars often deliver far less power than those at home. Best car charger: 12V to USB adaptors to keep your phone .juiced By ...