I recently installed a powerful sound system and decided to keep my Stock Battery. Its given me nothing but trouble, once i turn on the amp after 5 or so minutes of driving and I turn off the car it wont turn on. My car is a 2000 model with close to 35k on it. I did reseach and it seems to be common but that common? Also when I turn the car off to if anything was draining my battery it was at 2 amps so something in my car is draining my battery with my car off. I'm in the process of buying a Optium Yellow Top battery but anybody have any suggestions of what i should do? Should I take it to the dealership or anything?