Please don't say you bought it at walmart I love the store but! they don't rotate their batterys at all you could buy a two year old battery and not even know it. I was a tec for interstate battery for a year. All batterys have a stamp melted in them. ABCDEF the letter will mean the month starting with Jan. And the number will be the year. If the battery has more than one stamp it is six months old or more!!!

Paul