https://eclaim.kccllc.net/caclaimforms/DUB/Landing.aspx

Who’s Eligible- include all persons in the United States who purchased AA or AAA Duracell brand Ultra Advanced and/or Ultra Power batteries at retail any time after June 2009. Proof of purchase is not required. However, Class Members who submit a valid Claim Form with proof of purchase, such as a register receipt or documentation showing the price paid for the batteries, may claim $3 per pack of Duracell Ultra Batteries for a total of up to $12. Class Members who submit a valid Claim Form without proof of purchase may claim $3 per pack of Duracell Ultra Batteries for a total of up to $6.