Battery Low-Voltage Cutoff

I've built up three more with the parts I had on hand.  They'll be available for purchase once Tindie signs off on it.

I just put a project up on Tindie for the first time...but not this one.  Of that other project, I had JLCPCB build 5, but I probably only need one for myself, so that's 4 that are ready to go.  This, however, seems to be my most popular project.  I still have plenty of boards, and I think I ordered enough parts at the time to build a few more.  It's a simple circuit with a low parts count that I could assemble myself fairly quickly.

As for how the one board I built is holding up, I basically have two use cases for the battery adapter I built.  One is to run a 12V tire inflator to top off car and bicycle tires.  The other is to power a 300W inverter, which in turn runs the built-in inflator (which doesn't pull the full 300W, but it wouldn't even start on a 120W inverter I keep in my car) on an air mattress I bring on camping trips.  If I had to guess, they both present non-trivial loads at 12V, but the MOSFET I chose has been up to the task.

15 days to get here from JLCPCB, and that was with the cheaper shipping option.  When I got home, I pulled the parts off the breadboard, stuffed them into one of the PCBs (panelized 3-up, so I received 15 total), and hooked it inline between a Ryobi NiCd battery pack and a buck converter...and it worked!

Now I need to work on the packaging to turn all of this into a durable adapter that I can bring on the road with some battery packs...might need to start another project for that.