My bad. One of my old batteries snuck into my new bulk battery purchase pile.
The problem was, in fact, fixed by putting in fresh batteries.
What's the max voltage I can send to the kit? I see you've OK'd 4.5V, but how about 5V?
I've read your arguments against using 9V over AA here:
...but will I get more lifetime with the same footprint if I use a 9V with a 5V regulator (I have a bunch of these)? My dysfunctional AA combo was putting out 2.7V and it was resetting, so I'm inclined to go higher voltage accepting the inefficiencies that I'll get with a 9V and regulator, or is this more about mA output?
If I need to be schooled in electricity, please just send me a link instead of a reply