Rayovac is offering a $1/1 coupon on their Facebook page. Use this coupon to purchase Rayovac batteries at Walmart. The Rayovac batteries usually run about $1 for the AA or AAA 4 pack and for the 9-volt single pack. That will make these FREE after the $1/1 coupon! To print off your coupon just go HERE to their Facebook page. You will need to "like" the page in order to print.