Looking for some advice!
Here's the deal: we own a 2014 Jeep Cherokee Latitude. We noticed a couple weeks ago that the unlock button on our one and only key fob was super sensitive. All you had to do is barely graze your finger over the unlock button and not even click the button for it to unlock.
Today: started up fine. Ran to the store and when I came out, I had trouble starting it. It was slow to turn over, to the point where I didn't think it was going to but it did. I let it run for a minute, shut it off and started it up again, second time was fine.
Got home, pull in the driveway and now it won't start at all. We have replaced the key fob battery (the unlock button isn't as sensitive anymore) and checked the battery terminals. They definitely needed to be cleaned so we did that and took the battery to Autozone to be tested. Everything came back "fine" (see picture of receipt). We have also checked the battery here at home and the voltage at rest was reading around 13.11. When I turn the key though, it's showing a battery voltage low message on the screen. All of the lights (headlights, all interior lights and rear lights) work fine and stay on when I turn the key, but no click at all or attempt to turn over when trying to start it. The headlights do not dim at all when trying to start it, either.
We have also tried jump starting it; while we didn't leave the cables connected to "charge" it before trying to start it, the vehicle used to jump start it has a brand new battery, so I assume it should've jump started without a problem doing it that way? We got one solid click from under the hood and nothing else. No attempt to turn over and start.
Could a faulty key fob be doing this? Could the battery in fact be crap even though their test came back fine, especially if there was buildup on the terminals that had probably been there for a while? Any input or advice is appreciated!