Unswitched outlets and hardwired accessories are always connected to the car’s battery, whether the car is off or on. Car alarms are all wired this way, which is why they are designed to draw very little power. If you’ve ever left your lights on and come back to find that you can...
I figure that something is draining the battery, and after a series of events, like changing the battery cable and getting a huge knot on the side of my eye, and buying a light tester, I had my husband take my battery in (Oreillys) to be fully charged...and when he put it back...