I literally just replaced the Interstate battery in my kids truck (my old one) yesterday. Took it down to Interstate, it had a bad cell. Battery was 6 years old. They gave me $15 credit, which was the remainder of the pro-rated warranty, not sure how that worked out for me but whatever.
$150 later I'm on the road. Yeah, they are expensive but I think 6 years is a decent life for a battery, also when it's ass cold outside and they do the replacement work....that's worth an extra $20 all day long.
You guys have had better luck than me with Interstate. I've always bought Interstate, but every other year I have to get a new one in my truck for some reason. And even though they say they have this good warranty every time the rep has some excuse NOT to give me any credit for it. So, just the other day when my year and half old Interstate kept needing to be charged I decided to save some money and got one from Walmart. I'll tell you in a year or two how that went.
I did the same a few years ago with my boat batteries (5 of them). After Interstates not lasting more than a year and a half or so (still being prettty good but not being able to run hard all day), I went with batteries from CARQUEST. This summer was my third year on them and they would still take a whole day of running hard. Maybe in the bigger towns where you have an actual Interstate store it's better, but the rep who delivers and handles areas like Devils Lake sure doesn't uphold their warranty very well.
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