Amazon offers the Duracell Coppertop AAA Battery 20-Pack, model no. MN2400B20, for $6.87 with free shipping, via the directions below. That's $0.34/battery, tied with our mention from a month ago, and the lowest total price we could find for this quantity by $5. To get this deal:
  1. View the Duracell AAA Battery 20-Pack for $8.97
  2. click the "clip this coupon" button on the product page to take 75 cents off
  3. add it to your cart via Subscribe & Save for a final price of $6.87 with free shipping
Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.