for my 2016 Mazda, the keys do not need a battery to operate.
you instead need to hold the fob up to the start button and it will work passively, rather than just being in the car normally. Glad they still give manuals with cars as I had to learn that without service.
I think the main factor for this is how "mature" your starter is.
After feeding your starter it will expand, then collapse, then grow more sour.
I generally time it so that my bread isn't as sour.
If I am baking soon -- larger leftover starter and smaller feed.
if I am baking tomorrow -- tablespoon or so of starter with bigger feed to get my leaven.
Phase Margin (How far away you are from 180 Phase Shift) is a critical parameter used whenever designing any kind of feedback loop and testing for stability.
This is very to measure at the 0dB gain he pointed out, but lacked the phase diagram to show this shift.
you instead need to hold the fob up to the start button and it will work passively, rather than just being in the car normally. Glad they still give manuals with cars as I had to learn that without service.