Amazon takes an extra $3 off select Duracell batteries and chargers when you clip this coupon. Plus, several items qualify for an extra 5% off and free shipping when you order via Subscribe & Save. (Otherwise, Prime members get free shipping, or non-members can spend more than $25 to get free shipping. Some items may only be available via Amazon's Add-On Program.) With prices starting at $3.95, that's tied with our mention from a month ago as the best such offer we've seen from Amazon since last winter, when it offered a $5 Amazon credit with select batteries.

A best bet is the Duracell Rechargeable Batteries with Duralock Power Preserve 4-Pack (pictured), model no. DC1500B4N, for $6.49 with free shipping via the above discounts. That's tied with last month's mention and the lowest total price we could find by $5.