Battery is slowly draining

[Mustangman]

Watch this

Battery Dies Everyday: Testing For Parasitic Draw

or this

The BEST Way TO Perform a Parasitic Draw Test

or this

How To Perform a Parasitic Draw Test - EricTheCarGuy

But I will say a late model car with a less-than-new battery will do this even with nothing wrong. I’m currently (pun intended) charging my car right now because of this.