Amazon offers the Duracell Coppertop AA Battery 20-Pack for $7.72 with free shipping via the directions below. That's $0.39/battery and tied with our mention four weeks ago as the lowest total price we could find for this quantity by $5. To get this deal:

1. View the Duracell Coppertop AA Battery 20-Pack for $9.97
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 $7.72 with free shipping

Of note, Amazon also offers the Duracell Coppertop AA Battery 28-Pack for $11.12 with free shipping via the instructions mentioned above. That's $0.40/battery and the lowest total price we could find in this quantity by $17.

Cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.