Almost every store is selling a Deka or a Johnson Controls battery. Nothing wrong with them, but not as much variation between brands as the stores would have you believe. As a rule of thumb, just stay away from the economy battery at any store. Sort through them to get a very recent date code and verify it has good voltage on it before carrying it out of the store. I like to attach the receipt to the battery in a weatherproof fashion (like a ziploc bag and some duct tape if they don't give you one of those little pouches). Even if you have a system for storing and finding receipts, you may be 1000 miles from home when you need to warranty the battery.
