Office Depot has “Free” batteries.  OK, not totally free, but I used quotes, so I’ll allow it.  What they are doing is giving reward members 100% rewards for certain packages of Duracell Batteries.  So that means that you can buy the batteries and have the entire amount of the purchase price added to your Office Depot rewards (the program is free to join) and you will have that amount to spend later at Office depot on something else… Maybe more batteries.

So, check it out and get up to speed.