Batteries drained to dead, what is nominal drain on truck?

I was having that same problem so I bought a NOCO Genius car starter. It's not a battery charger but a small powerful Lithium ion battery small enough to `almost' fit in a glove box.
It was worth the approx. $100 to know I'd be able to start the truck every morning.
P.S. I also got a new battery to replace the one that was almost three years old.