[masraum]

Originally Posted by Noah930

I bought a '95 Nissan, new from the dealer. The Nissan-branded battery lasted 10 years! And the car lived outdoors in New England for the 2nd half of that.

Otherwise, batteries in daily drivers seem to last me 3 years, on average. If I throw the car on a battery charger every once in awhile (like on the garaged Porsches), then maybe I can add another year or two to that.

My experience have been that most OEM batteries seem to last a long time, 7-10 years, but that most aftermarket batteries last 1/3 - 1/2 that long. I think there are likely some aftermarket batteries that last like OEM, but I don't think most folks splurge for the "top of the line" when they buy a new battery. AGM may last longer than FLA under the same circumstances, but I don't know that for sure.