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Just replaced all three batteries in my boat. I've got an optimax, so my starting battery needs at least 800 cold cranking amps. Not too many places have those, since most marine batteries are between 500 and 600. Interstate has them, as does Academy and Advance. The batteries at Academy are cheap, but you get what you pay for because they are lousy. But I had an email from Advance that said I could get 35% off my next purchase by using coupon code WD59.

Sure enough, I replaced the starting battery and the two deep cycles for a total of about $220. It was going to cost me about $450 at Interstate. So if anybody else is getting the boat ready for summer, just purchase the batteries on the website and put in coupon code WD59. Then you just drop by the store with your old batteries and pick up the new ones.