Sorry if I'm a little cynical about this--but the last time I bought a battery, I researched it carefully and then couldn't find any of the ones I wanted. Finally, I just went to a local chain parts place, got one of their upper-end batteries, and went with that. Unless you want to spend a fortune, probably most batteries are about the same. You might check reviews, just to see if there is anything you need to avoid; some have a rep for being unreliable, for example.