Duracell NiMH Rechargeable AAA Batteries 4-Count Package (2-Pack) for $14.32 shipped after selecting Subscribe & Save to save an extra 15% and receive free shipping.  The subscription can be canceled at any time with a few clicks.  That is a total of 8 of these NiMH rechargeable AAA batteries.  Here is a screenshot for your reference.  Getting two packs of these rechargeable AAA batteries normally add up over $24.