Amazon has the 20 count Duracell Coppertop batteries on sale for $7.72 when you select Subscribe and save and clip the $0.75 coupon. Here’s how:
Go here to the Duracell Coppertop batteries page
Choose the 20ct AA
Clip the $0.75 coupon in the middle of the page
Select the Subscribe and Save option
Your total should be $7.72 shipped
New to Subscribe and Save? Amazon often offers discounts if you sign up to receive auto shipments (which can be canceled at anytime). I often select that I want to receive the item every 6 months and once I receive it, I go to “My Account” and click on “Manage Subscribe and Save” to cancel it. But DON’T forget or you will continue to receive the item at the interval seclected!