I am going to bet that somebody already found this, but I will tell the
group about it just in case.
If you are looking for a power adapter to run your M100 from a USB
battery bank, this is the ticket:
https://www.amazon.com/dp/B0BJDRV4H5
Boost to 6V and it is already center negative so you don't even need to
crack it open and flip the wires.
Of course, you can run the M100 from the 5V directly, but you will get
more life out of this as the M100 shuts down at 4.8V from my understanding.
The only drawback is that it will draw power from your battery bank the
entire time it is plugged in since it draws enough current by itself to
keep the battery bank turned on.
