Hi Folks!  It's been a very, very long time since I posted here.  Been dealing with some health issues and wife's dementia and I just lost interest in my Hellcat.  Okay, here's the point of my post.  After sitting for several months in my garage on a battery tender, I went to start the car (out of guilt for not doing so for a long time).  The battery was completely dead.  I mean as a door nail.  I put it on a portable charger (Wolfbox), started it and that's when all Hell broke loose; lights flashing, horn going off, rough idle, the wrath of God coming down on me.  It's also had a blank screen.  My question is, could it be that the gas went bad or that the battery did not have enough charge to run the electronics?  I don't know.  I'm going to replace the battery (which looks like a difficult job) and see what happens.  Your thoughts.  Anyone else have this happen to them.  Thanks.  I hope all of you are doing well!!