Hi, I have a old toyota Celica, that i don't drive, keeping in a garage as a collectors item, but as its parks up for so long the battery goes dead and will not start when i need it, if i need to take it out i normally jump start it off another car, are use a booster, what can i do?? disconnect battery when not in use?? keep batt on charge 24/7?? any help would be much appreciated thanks..