Office Depot and OfficeMax again offers the Duracell Coppertop Alkaline AAA Batteries 16-Pack or Duracell Coppertop Alkaline AA Batteries 16-Pack for $15.99. Plus, Office Depot and OfficeMax Rewards members will bag a $15.99 Rewards Credit for free. (Not a member? It's free to sign up.) With free shipping and assuming you'll use the credit, that's essentially free, and a great deal on AAA or AA batteries. (It's the best deal we could find now by at least $11, although we saw it for a buck less in October.) Deal is limited to two per customer.

Note: Allow up to five weeks after the promotion ends for Rewards to become available in your account.

Update: Opt for in-store pickup to avoid the $9.95 shipping fee.