Target offers the Sanyo eneloop AAA Rechargeable Battery 4-Pack, model no. SEC-HR4U4BPN, for $7.99 with free shipping. (Amazon charges the same.) That's $1.99 per battery and tied with last week's mention as the lowest total price we could find by $2. These 800mAh AAA batteries are precharged and can be recharged up to 1,500 times.

Update: It's now out of stock at Target; however, Amazon still offers it for $7.99 with free shipping for Prime members. (Non-members can spend $35 or more to qualify for free shipping; otherwise shipping adds $5.74.)