Amazon offers its Prime members the Sanyo Eneloop AAA Ni-MH Rechargeable Batteries, 8-Pack for $15.99 with free shipping. (Non-members can spend over $35 to get free shipping; otherwise, shipping adds $5.74.) That's $1 under our October mention and the lowest total price we could find by $4. These 2,000mAH AA batteries are precharged and can be recharged up to 1,500 times.

Also available is the Sanyo Eneloop AAA Ni-MH Rechargeable Batteries, 4-Pack for $7.99 with free shipping. (Non-members can spend over $35 to get free shipping; otherwise, shipping adds $5.74.) That's tied with our October mention and the lowest total price we could find by $2.