I drive a 1995 Mercury Cougar with 109,000 miles. I bought a O’Riley Automoative battery with a 7 year warranty 11 months ago. After I initially installed the battery, after 2 weeks the battery was drained. This 2 weeks includes driving and not driving the car. I will charge the battery backup with a battery charger and 2 weeks later, the battery is dead. This is the second time I’ve bought a battery for the same car, and the same issue happens. I have had to charge this battery at least 10 times in the last 11 months. After 6 months of this, the 2 weeks time period shortened to just 4 days with battery power until it is drained.
I am trying to figure out what in my car is draining the battery. The car doesn’t have to be on for the battery to run out.