I went to Home Depot to purchase an Acura car fob battery. The size was 2032. They were out of of the two pack which costed $5.97 for 2 batteries. I asked the attendant to check if they had any 2 pack in stock but he couldn't find any. They only had the 4 pack battery in stock which was $10. I was very pleased when he told me since they were out of the 2 pack, he could sell me the 4 pack of 2032 batteries for half price which only costed me $5. What a deal!