My battery drains with no noticeable lights or anything on.

I can take it out the car, put it on a charger overnight have it fully charged. Then after i connect it to the car and leave it, within a few hours its drained into the 8's and the engine wont turnover. I can jump start it to turnover and the alternator will charge it while it runs. Itll drive fine after a few minutes. but as soon as i park and turn it off it'll drain down. HELP!!
completely baffled!!

 

You need a multimeter/ammeter to check your current draw. After you get the ammeter hooked up you start pulling fuses to see which circuit may be causing the excessive draw.

There are numerous threads that tell you how to do it.