Nice to see your new set up! I have a Pi 3 as well, and plan to use it in some crypto projects. I knew it was energy efficient but didn't realize you could power it from a battery pack like that. I have one of those as well so I might try that too. I've been thinking of a solar charging kit, to make the entire thing free to power, just have it run off the sun!
I plan to do something similar, I have another battery pack like that, that I have in my bugout bag that has a solar charger on it. I am going to build the lore wallet and transfer all my blackcoin to it to make it run POS all the time without worrying if my laptop or desktop is always running, and can stash the pi anywhere.