Amazon offers the Duracell AA Coppertop Duralock Battery 34-Pack for $13.46. Clip the $1 off coupon on the product page and add it to your cart via Subscribe & Save to cut it to $11.79 with free shipping ($0.37/battery). That's the lowest total price we could find by $10.

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