Staples: Free 20-packs of Duracell batteries!

From now through December 26, 2009, you can get free batteries at Staples! Just sign up for their Rewards card and then buy a 20-pack of Duracell batteries at $12.99 and you'll get $12.99 back in Staples Rewards.

This deal can be done twice per week per customer. So by December 26, you should be good and stocked with batteries!

More details here.