i had to replace a battery on my previous car and went to advanced. they have 3 levels of "quality" in their battery line like many manufactures do. i wanted the platinum (or whatever the top of the line was called) but they didn't have one to properly fit the vehicle i needed it for. they did have the mid grade however and i started a conversation with the "tech" who came out to do the replacement. since i couldn't get the top of their line i was a bit concerned about quality. i was told that the lower level battery experienced an approximate failure rate right out of the box (so to speak) of almost 50%. the mid range battery failure rate was approximately 30% out of the box and their top of the line product failed approximately 10%. like many things these days, quality control is minimal if it exists at all, and they would rather replace a bad item leaving the quality control to the end user, than to pay for it at point of manufacture.