The Autozone battery in one of my Buicks lost a cell the other day. Date on the side said 2009 so I got pretty good life out of it.
The current 75s Gold top replacement from AZ is $119 here but it had a bit less capacity as is typical of summer type batteries which is not a bad thing. But, I thought I would look around and see if I could find a Sears Platinum which is actually the Odyssey battery with a Sears label on it. Enersys makes them and they have a good rep. Looks like Sears stopped carrying them last year, so, I kept looking.
I looked at Sam's and saw they listed an AGM battery with the Duracell name on it. I did not know they even had a car battery, but, research showed it is made by East Penn which generally has a good reputation. It had a bit more capacity (probably because it is an 34/78 group size) than the AZ battery and AGM can be pretty good in a car that is not started very often. Sam's had the 34/78 for $129 which was cheaper than most sizes so I bought it.
the 34/78 is about an inch longer than the 75 group size so I took a cut off wheel and cut the spacer off the tray on the radiator side and the battery sat down in the tray perfectly.
So far, so good. I would have rather had an Energizer battery but it did not come with a rabbit.