This deal has ended.
This 40-pack of AA and AAA Duracell batteries drops from $39.99 to $15.99 at Rakuten (formerly Buy.com). With free shipping, that's the best price we could find for a Duracell 40-pack, beating even Costco and eBay prices. The assortment includes 30 AA batteries and 10 AAA batteries; you'll get 16 Rakuten Super Points back on your purchase. Sales tax is charged in select states.