Target offers the Sanyo eneloop AAA Rechargeable Battery 4-Pack, model no. SEC-HR4U4BPN, for $7.99 with free shipping. (Amazon charges the same for Prime members.) That's $1.99 per battery and tied with our mention from two weeks ago 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.