I knew the old battery was on its last leg. Starting the engine always produced a slow chug-chug before it fired up... but it would reliably start every time. The battery finally gave out a few days ago, so my wife had AAA come and replace the battery.
Now, 9 times out of 10, when you turn the key you hear some motor/blower noise under the car like you normally would, but the starter doesn't turn over at all. All the lights are on, AC fan works, the battery seems fine. It just doesn't seem to be connecting and starting the car. After a number of tries with nothing happening, the car will start right up. Starter turning over fast, unlike with the previous battery.
Just can't figure out what's going on now that we have the new battery in it.