Bcoz my car has been sitting for so long after my accident I go out now and again to start it up but most times I need Anne's car to jump start it and I leave it for 20-25mins ticking over but the next day I need it jump started again. Once I start driving again would it be best to buy a new battery or just get it charged up? It's the original battery on a '57 plate with 20,000 miles on the car.