Batteries Plus is a chain outlet in many cities and can get these batteries
if not in stock. The 3ET has the higher capacity and weighs 5lbs. more than
the 3EE. 600 ca and 125 min. vs. 480 ca and 90 min. (The batteries are
listed under tractor batteries at their web site.)
Jim
PS This old battery design worked great for me on my recent 2 month, 15000
mile road trip. Just don't run it down too low, too often.