Costco members can get a 40-count package of Duracell batteries for just $17.99, normally $20.99.
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This is a good deal considering that Costco sells a 48-count package of Kirkland Signature batteries for $15.99.
Keep in mind that a Costco membership isn't required to purchase it online, but there's a $3 delivery fee, and nonmembers will pay a 5% fee at checkout.
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Find this deal and more of our favorite Costco coupon book deals.
Did you know Costco is increasing its membership prices in September? If you're not a member yet, now is a great time to join. Sign up for a Costco membership before the price hike.
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