Dang Battery

Went to star the Demon and got the old rrrr rrrrr rrrrrrr poooooof
carb sitting there with a nice constant 1' flame. Burns down, I blow it out.
Battery was new last year. Sat with the disconnect turned off, and it's dead.
I bet if I go out to my 76 Dodge van or 96 caravan, both will start right up, and neither have been touched since before the Demon was put away.
Grrrrrr :x