I have a Subaru that the battery goes dead when towing, so I just bought http://www.ebay.com/itm/301976566770?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT & have installed it on my car &...
They just replaced the battery under warranty ( but it died 3 times while towing & that is what killed it) If I start the car the voltage is 14+ like it should be .