B&H Photo Video has a 4-pack of Sanyo Eneloop NiMH 800mAh Rechargeable AAA Batteries (SEC-HR4U4BPN) for $6. Add two to cart to reach $12 + $3 shipping = $15 shipped
. The undisputed product leader holds up to 75% of its charge up to 3 years. Amazon
has a single 4-pack for $9
with free shipping.