I am having problems with my Sears tractor starting. Battery is low. How do I determine the age of my Husky battery? Here is the info on my battery: Husky GT-X, SK# 04-70899, 300 CCA @ 0 F. I assume the CCA @ 0 F is cold cranking ampsat 0 deg F? I do not know what the rest is? Could the 04 stand for the year 2004?