These aren't exactly what I got, but they look very similar:
https://www.amazon.com/Micro-Cable-S...dp/B00JCZ2FQQ/
https://www.amazon.com/Micro-Female-...dp/B00NSBVNCM/
I've been testing mostly with something that looks like the first one -- connecting power via a 5V 2.1A USB charger.
I've tried what looks like the second one via a connection to a PC's USB port but it doesn't seem to work as well.