Staples is offering two free 20ct packs of Duracell Batteries (AA and AAA). The way this deal works is you buy the batteries and get your money back via Staples Rewards. Staples Rewards is like a rebate but the money you get back can only be used at Staples. When I have done this deal in the past, I use the Staples Rewards I received to buy things like ink to print coupons.
Thanks, Money Saving Madness!