Just put a new battery in my 2005 DK45S today. Group 24, got this one from Napa. never had good luck with Interstate, even though most batteries are made my interstate. I am on my fifth battery as of today. Have problem with the cells shorting out.
the original battery(Interstate) last 6 months and was replaced under warranty, which had to be replaced 18 months later. Had another battery which I don't remember what it was, but lasted up to 3 years and 6 months ago, ( was mowing the yard, and shut the tractor off to talk to somebody, and went to restart and had nothing) which at that time installed a Walmart battery, which has failed in the last week.