Not uncommon if your tractor sat on the dealers lot for months without being charged or something was left on running it flat.
Doing either will significantly shorten the life of a cranking battery.
When buying a new tractor from stock I insist that the battery be replaced if I suspect either.
Dean
Maybe you are right i know it was sitting outside for a few months at the dealer ship. I guess advanced auto will have a replacement maybe even costco been buying my car batteries there.