Amazon offers Prime members the Sanyo eneloop AAA High-Capacity Ni-MH Rechargeable Battery 4-Pack, model no. HR-4UWXA4A, for $9.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $6.79.) That's $3 under our summer mention and the lowest total price we could find by $4. These 950mAh AAA batteries are pre-charged and can be recharged up to 500 times.