Amazon offers the Duracell Rechargeable NiMH AAA Batteries 8-Pack for $12.09 with free shipping via the directions below. At $1.51 per battery, that's $2 under August's mention and the lowest total price we could find by $10. To get this deal:

1. View the Duracell Rechargeable NiMH AAA Batteries 8-Pack for $15.99
2. clip the $1.50 off coupon on the product page
3. add it to your cart via Subscribe & Save to cut it to $13.59
4. proceed to checkout, where it drops to $12.09

Of note, be sure to cancel Subscribe & Save after your order ships or you'll be billed for subsequent shipments.