battery keeps dieing

Dumb question but are you sure your battery is good? Did the old battery keep dying? I took my Optima Red Top to Batteries Plus because I just couldnt get it to keep any kind of charge either by putting it on my charger or driving it. It would be dead in a day or two. They put it on there slow charger and cycled it for about 3 days and it's top notch now (came up to 95%)...just a thought if you find that theres not something drawing on it elswhere. Batteries + did it free of charge too...