The Battery has died on my 2009 5045E. The battery the came in the tractor was installed by the previous owner. It is a group 27 battery. 810 CCA and 1000 CA. My question is , would the group 27 battery be the OEM size battery? There is enough space for the larger group 34 battery. My tractor is really slow to start on cold winter days and I am thinking the higher cranking amp battery would be beneficial. What are your thoughts? Also should I buy an AGM battery or another lead acid? My tractor sits without getting used most of the time. I would say It gets used once a month to about 6 weeks depending on the season.