DealGenius offers the Duracell 48-Pack of AA and AAA Batteries for $19.99. Coupon code "wed25" cuts it to $14.99. With free shipping, that's 31 cents per battery and tied with our mention from last week as the lowest total price we've seen for this bundle. (It's also a current price low for this quantity by $9.) This pack includes 24 AA and 24 AAA batteries.