Thought I'd share my experience on the battery issue.
I just got my TC33DA back from its 50 hour service at the dealer. Thanks to this forum, I knew about the battery problem and the right angle coolant hose problem, so I mentioned them to the service manager.
I'm happy to report that my dealer (Hanley Implement) took care of me well. They replaced the OEM battery with an Optima yellow top battery, and replaced the right angle hoses with an improved setup of metal lines and straight hoses. All this was done under warranty, plus they delivered the tractor after completing the services (33 mile one way trip) for no charge.
I guess I'm fortunate to have a good dealer who has demonstrated a willingness to take care of problems.
Tom