Not as cheap as in Prime day in Oct but still pretty good for quality batteries.
Posted by tightarse
$10 Bonus Cashback on $10 Spend at Any Online Store @ Cashrewards (Activation)
As seen by some comments further below, the above $10 bonus may not apply as the category for batteries may have shifted from what they were/are listed under in Amazon listing to Health & Household. Therefore, it's best not to rely on this purchase for the $10 bonus.