I have a 2023 Chrysler 300 and it recently complained that my key fob's battery was low. I replaced it with a new one (several times with new, measured good, batteries) and the fob stopped working in my car. The original battery measured 3.00 volts, hardly "bad". I have attached a picture of what my fob looks like since there seem to be many variations of fobs. I have looked in many places on the Internet and none of the instructions are for my car and fob combination to reprogram it. They all say to insert the emergency key from the fob in the ignition. My car has no mechanical ignition, just the start button. I can still open the door with the emergency key and I can start the car by pressing the fob on the ignition start button but I cannot find any instructions for reprogramming the fob. I have a second fob and it still works but even it stopped working after I changed the battery. I re-seated that battery and it started to work again. No such luck with the other fob that I'm writing about here. I also noticed an odd, I guess conductive, goo on the terminals for both positive and negative. This got mostly wiped off and discarded with the original battery. What is that stuff? The new, replacement batteries are "Sony" and measure 3.3 volts. Please provide specific pointer to instructions for my setup if you can. Remember, there is no ignition hole for the emergency key. I looked in the glove box and the console. If I missed it, please provide a picture of where it is?
