This deal is ending soon! Get 16 batteries for free plus score a $0.46 moneymaker! Through 8/14, buy two specially marked packages of Energizer Max batteries at Walmart and receive a free $10.00 Walmart gift card. Look for packages with a blue mail-in rebate sticker attached to the front of the package. Open the rebate packaging to reveal a code. Log in with the code at energizer.com/giftcard to get a $10.00 Walmart gift card by mail.