Thanks , I just went to sears yesterday and up-graded all my batteries. I purchase two PM-1 (group 31) for trolling and one PM-2 (group 34) for the cranking. I was mainly looking at the recommended CCA rating when I made that decision. With your advice I’ll just bring the PM-2 back and exchange for the larger one. The PM-1 has plenty of CCA @ 1150 . Did I mention it’s a pain changing batteries out LOL.Brian[font=VERDANA,SANS-SERIF]Diehard Marine Battery, Platinum PM[/font]PM-1 , 75 Lbs. , Group 31 , 1150 CCA ,205 Min RC and 100AHPM-2 , 83 Lbs. , Group 34 , 880 CCA , 135 Min RC and 68 AH