There are three giant players, and a few minors in the battery
building business. The cases are made by yet again a few major
plastic molders. Each one of these can and do deliver to a big box
store whatever that store wants, and stick on their paper label. The
exceptions are a few battery boutiques that don't build blank case
batteries, hence Surrette and Rolls. You get what you pay for, less
the markup. There are two ways to measure a battery's value: by
weight and by warranty. Go figure.