(ET) ET-Regarding Sam's Club Batteries

[Habooly1 wmconnect com]

I just bought 6 batteries from Sam's Club in Harrisburg, Pa. The label on the batteries says they are distributed by Exide Technologies, Atlanta, Ga. Small world.
They cost about $47 plus 6% sales tax (about $50 each). I don't think they are the top of the line. The label also says they are "GC-2" and  "110 minutes @ 75 amps".
I don't know what all that means,  but the Exide batteries that I bought in 1996 are called "GC-4"  and they still work. I got them for about $63 each from The Battery Warehouse.