Amazon still 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 last week's mention, and the lowest total price we could find for this quantity by $8. To get this deal:

1. View the Duracell AAA Battery 20-Pack for $8.97
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 $6.87 with free shipping