MY Rant, GM Batteries

GM side posts have less surface contact area. Typical cable end only has 4 contact spots, three little anti-spin tabs and the bolt. The lead around the anti-spin tabs gets wallowed out and causes the cable to get loose, you try to tighten it down so the cable has a good connection and the nut that's imbedded in the battery will pull out, or just spin making the battery junk.