The AC Delco battery I had in my old car lasted 7 years... Just saying

And I think my stereo made it die faster than it would have

 

If we're going for records, the MotorCraft battery lasted 15 years in my truck and I still use it as a spare in the garage.

(btw, it's a 7.5 liter engine in my truck. Not exactly a light duty job for a battery)

 

Had a cold start on mine about 2 weeks ago; since I bought my car used I don't know how long the battery has been in there so I just went ahead and bought the Top of the line Interstate that will fit our cars with like 880 CCA. My car has 52,xxxk miles now, and purchased last Nov with 30,900