Newegg offers the Fujitsu AA 2,550mAh Ni-MH Pre-Charged Rechargeable Battery 4-Pack for $9.99. Coupon code "AFM17DEAL04" drops the price to $7.99. With $2.99 for shipping, that's $5 under the lowest price we could find for a similar 4-pack. They purport to be rechargeable up to 500 times. Deal ends April 14.