It seems like the aftermarket phone battery is so flooded with terrible counterfeits it can't be too hard to trick a phone into thinking a battery is genuine. I'd really like to learn how to use an 18650 in my old phone instead of buying a new crappy fake off of Amazon every few months but it won't power up without the extra 2 pins connected to the extra circuit.
I hate the idea of not being able to use something just because the manufacturer stopped making quality batteries for it. Right to repair etc etc
Edit: Okay maybe I need to clarify more. I keep buying batteries for a phone I have on Amazon. Every single one won't hold a charge after around 3 months. These are terrible quality, and this is not a phone I keep in my pocket and 18650 cells are so ubiquitous it would be very practical to have the option of using an 18650 cell in any old phone in the future, but I need to learn how to get the phone to boot up with one. I don't want to be forced to use phone specific batteries so I'm trying to get some information on how to accomplish this goal.