Amazon offers the Energizer 2032 3-volt Lithium Coin Battery 4-Pack for $2.18 with free shipping via the steps below. That's tied with our February mention and about a buck below what you'd pay in-store locally. To get this deal:

1. View the Energizer 2032 3-volt Lithium Coin Battery 4-Pack for $2.82
2. clip the 50 cent off coupon on the product page
3. order via Subscribe & Save for a final price of $2.18

Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments