I have a 2013 altima and have 2 keys. Earlier in the year my main key battery was low so I changed it, and after changing the battery the car said key id not recognized and it wouldn't work with the car at all. So I just decided to use my spare. Now the car is telling me the battery is low in the spare and I'm terrified to change it because if it messes this one up I can't even drive to a dealer to fix the problem. Does anyone have any advice?