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Originally Posted by Foldbak
Mine came with Interstate 27 deep cycles. Their a year old. One of the batteries just had a cell short. Caused havoc last trip out. I'll be replacing that one. Still a good battery though.
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It looks like the Interstate 27M battery has only a 1 year warranty. Pretty short IMO.
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If I had $1700 just laying around I'd upgrade to lithium. One day but not today.
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You can buy a Chins 100 amp hour lithium battery for $319 off Amazon. That is less than 2 Interstate 27Ms and provides slightly more *USABLE* amp hours than two 27Ms. (A 27M has 88 amp hours each; two of them give total of 176 amp hours but only 50% (88 amp hours) is usable without affecting the life of the battery.) Plus the Lithium battery charges much faster.