Originally Posted By: The_Eric
First off- there are only three battery manufacturers in the U.S. Second, the various parts store batteries are made by different manufacturers, depending on region.
IMO
#1 East Penn
#2 Johnson Controls Incorporated (JCI)
#3 Exide
Exides have squared off cell caps, JCI's have 45* corners on their caps and East Penns typically don't have any caps. They are usually sealed with a small vent on either side of it.
In my opinion and experience, both Exide and JCI batteries are messy (more than from leaking post seals) and are underpowered compared to an East Penn. I have also seen greater life from East Penn.
I'm also a fan of Deka (East Penn) batteries for the same reasons. They have a very good reputation, but are discussed less often than other brands since they aren't carried at as many places as Johnson Controls. As far as I know, they are made in the USA. Just bought one last month for my Optima.
Johnson Controls still makes a good regular lead acid battery though. It isn't unusual to see them live for 5 years, which is pretty good with the summer heat in NC. The more expensive Optima AGM batteries seem to get mixed reviews.
I haven't personally had experience with Exide recently so I can't say much about those... but I seem to hear more negative comments about Exide than others. The only Exide batteries around here that I know of are some of the current Bosch batteries at Pep Boys.
Deka makes CarQuest batteries, and I have heard reports that NAPA batteries are now being made by Deka as well. This may vary by region. As said above, look for the sealed design. Also, I have noticed that Deka batteries have oval shaped vents on the sides.
With any of them, if you get corrosion, baking soda and water is the perfect way to clean it up. I use the felt anti-corrosion pads between the posts and the cable terminals, and a small amount of the red anti corrosion spray. This seems to help prevent the corrosion from happening.
The most important thing is that you get a fresh battery, or at least one that has been maintained with a full charge. There's a Wal-Mart near me that has batteries dated nearly two years ago with a layer of dust on the top. Those probably won't last as long as fresher batteries. When a brand gets a bad reputation, it is often due to improper handling at the store such as not rotating stock properly.