@stib I've been salvaging the batteries out of discarded vapes anytime I come across some. (Even going as far as to ask folks who partake to save their empty pens for me.) I'm definitely not above picking them out of trash cans or otherwise grabbing discarded on the ground! That's the closest I can get to free energy, hehe~ :blobfoxlaugh:

A 750mAH battery cell may not be terribly useful by itself, but they do add up to a decent capacity once wired in series/parallel.