Dead battery

[Tlay]

I have a 2020 Ram 1500. My battery went completely dead after a trip and it sat at the airport. I had it jumped and thought that the battery was 4 years old so I replaced it. A month later the battery died again. This time I had all kinds of service warnings on the dash. I charged the battery and a couple of weeks later it died again. I had it hauled to the dealership. They couldn’t find anything wrong!
Now it did it again. I am supposed to take it back to the dealership. But my extended warranty is not covering anything because they can’t find anything wrong other than a dead battery. Has anyone had this problem and what did you find?

 

[chaosh1]

Very first thing would be to use a meter and check for parasitic drain. I'm inclined to think you have something pulling current as you already have a new battery.

 

[1979PowerWagon360]

I agree. Or an alternator that's not properly charging (despite what dealership said). Did you find the problem?

 

[maestro827]

Do you have any cracked taillights?... im having issues with my rebel... when it rains a river forms on bedrails, runs and unloads right into the back of my taillight with a weak gasket between blind spot module n housing.... fills up with water and kills the battery.... if you remove your tail youll see the corrosion behind it forming............ IM current and have valid MAJOR GUARD WARRANTY til 2030 but a clause in contract leaves my truck stranded currently because warranty says no Water Leaks are covered.... I dont know what to do....