Here is a great coupon that can lead to some free batteries at Target. Become a fan of Rayovac on Facebook, click on the COUPONS tab and you can print the coupon for $1 off. You can print this coupon twice per computer. Target often has these in the Dollar Spot.
Swagbucks is totally free! It is a search engine that rewards you for searching! While you search you earn swagbucks that can be traded in for all sorts of things. My favorite is Amazon gift cards! Totally legit! Try it out!