Jeff- I got this 4D battery from NAPA auto for $165 in early 2017(a really good deal) when we bought our boat, but regrettably it is now $245 https://www.napaonline.com/en/p/NBP7266 It was recommended by a buddy who owns a 2000 Cat320 who did the same, Seems to be performing well. Take care! Dave Hupe'94 Cat 320 (#32)Holland, MI