Check the batt. voltage. if there is a dead cell then it will only have 11.5 V, if you already got twelve then it isn't that. As for the drainage you will need someone from a shop to check that out. I think it is a paracitic load. Finding out where parasitic loads are is quite a task, i had to do that shiz in school recently and it took me some time.
But here is a link describing one way to diagnose load problems.
Hope it helps man,
Will
But here is a link describing one way to diagnose load problems.
HTML:
http://www.uuhome.de/william.darden/carfaq10.htmHope it helps man,
Will
