On my escalade, I put the OEM AC delco battery on a charger overnight and it did not hold a charge. I priced new car batteries at the local auto parts stores and they all ranged from $115 - $150 for their store brands batteries that fit the escalade. I went to Costco and they had Interstate car battery for $83. I don't think you can beat that deal so I bought it. I did not feel like checking Wal-Mart car battery prices as I did not want to be in Wal-Mart on a Saturday afternoon. And Sears is just too far from my house so no on Die-hard. I liked the oem delco battery as I got 8 years out of it, but the dealer wanted over $250 for a new one. your thoughts on interstate batteries?