I was at Walmart last night and I saw a cardboard stand filled with batteries and one of the sides had 15 pack of batteries for $5.95.
Rayovac has a $1.00/1 coupon here on their Facebook page, just click on the Coupons tab, which would make the 15 pack only $4.95.
The Duracell batteries was a 10 pack for $5.95. 11/14 RP Insert has $1.50/1 and 10/31 PG has $.75/1. Either of these will make a good deal, as a 4 pack are $3.50 – $4.