I had no troubles with a proper micro-USB supply so far as long as the cables are not too thin, I use those AWG 20 phone charger USB cables and off the shelf 5V/3A wallwarts (simple SMPS, no chargers since those try to be smart about current limits...) that come with like 10 different adapters including micro-usb and the new 3.5/1.35mm barrel plug...
e.g. https://www.amazon.de/PortaPow-spezielle...B00RQ5AZL6
e.g. https://www.amazon.de/PortaPow-spezielle...B00RQ5AZL6
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