Duracell coupons are rare and can be found every couple of months in the Smart Source newspaper insert. The coupons are typically valued at $1.00 off one product. Mobile rebates on can be found on Checkout 51 and Ibotta, and are usually valued between $1.00-$2.00 off one product. Stock up on Duracell batteries at Office Depot/Office Max and Rite Aid when the price is below $0.50 per battery.