Amazon offers the Duracell Coppertop AA Battery 28-Pack or Duracell Coppertop AAA Battery 28-Pack for $10.29 with free shipping via the directions below. That's $0.35/battery, and the lowest total price we could find in this quantity of either size by at least $8, although we saw them for a buck less three weeks ago. To get this deal:

1. View the Duracell Coppertop AA Battery 28-Pack or Duracell Coppertop AAA Battery 28-Pack for $12.99
2. click "Clip this coupon" on the product page for 75 cents off
3. add it to your cart via Subscribe & Save for a final price of $10.29 with free shipping

Cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments. They're not guaranteed for delivery by Christmas.