Do you have a battery charger? Car might not be able to give it a full charge or you're not driving enough to give it a full charge. I'd throw it on a battery charger and see how much more you get out of it. You should also get it load tested at an auto parts store. Also about those Walmart value batteries, you could try one of those, just a one year warranty but I think someone on here posted they got one and it lasted 3-4 years which was the typical amount of time they got out of a battery as they were in a hot state where batteries only last 3-4 years. I would think in NY it would probably last longer. $50 is not bad for a used battery only 9 months old, but I think the value one at Walmart is $65 and it at least has a 1 year warranty. I guess I'd pay the extra $15 for a one year warranty.