Purchase $100 or more worth of Duracell products and get a $25 Gift Card for free via this mail-in-rebate. Better still, any Duracell battery purchases made at almost any store dating back to October 1 can be included to add up to the $100 minimum needed to redeem this gift card. That's tied with our mention from last December and only the second such deal we've seen on Duracell products. Some restrictions apply. Deal ends December 31.