Ever since I Bought my car in 1982 I have had a problem with thr battery runniung down if the car is not used a week or two.I have had it in various shops and auto electric shops but they all say there is nothing causing a leak and the battery drain is from electronic drain even when the car ignition is off. I have now added a cut off switch on the battery cables and this keeps the battery charge up. Lately I have noticed that using my air conditioner practically drains my battery and when I shut down at times the battery is too weak to start. I have a new heavy duty battery. Can anyone help me before I throw in the towel please? Flix