I recently pulled out the batteries on my 2015 24R. They were marked on the sides with the sticker 27MDP. Exide group 27 marine duel purpose. One had been leaking so I replaced the pair with grp 31 AGM.
^^What they said^^. I am at Dynamax now and we use the same battery box on the Isata but we run Group 31 AGM batteries...so I know those fit as well.
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