I need to replace another battery again (I have 5 ATV's and it seems like an ongoing proposition). I decided to spend the extra cash and try out a couple of Odyssey batteries in two of my ATV's. After about 22 months one of the ATV's would go dead if left off the battery tender more than a week. I attributed this to some sort of phantom battery draw. While it was in the shop for an unrelated repair, I had the shop diagnose the electrical issue. It was diagnosed to be a failing battery, this not what I had anticipated given the Odyssey battery reputation. I wrote Odyssey to see if they would prorate the battery given it was two weeks over 24 month warranty period and they did not respond.

I now need to buy a new battery and I will not pay the premium price for a product that only lasts as long as a Walmart battery, (which costs about 1/3 of the Odyssey). I'm looking at the Interstate AGM, which costs somewhat less than the Odyssey. Any other suggestions for a new cost effective reliable AGM?

Incidentally, the other Odyssey is still in service at 27 months, hopefully it lasts a another season or so. I also keep it on a battery tender when I don't ride the quad for more than a week or ten day stretch.