Not maintaining a battery is the biggest killer of cranking type batteries the way they're designed if you crank on it till it;s under 50% of a full charge it will shorten the lifespan dramatically. If it's a lead acid not keeping them topped off and using a dumb charger will do the same by boiling it dry. I've had 7-8 year old lead acid batteries check out like new the one in my John Deere is a 9 year old Interstate. I like AGM's just for the fact there's no upkeep to them, really doesn't matter what brand as long as it's made in the US. There's an Optima plant 20 miles from here they manufacture batteries for quite a few brands.