Amazon offers the Duracell Coppertop AA Battery 28-Pack for $10.29 with free shipping via the directions below. That's $0.37 per battery, tied with our mention from a week ago, and the lowest total price we could find in this quantity by $8. To get this deal:

1. View the Duracell AA 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

Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.