Newegg offers the Powerex 2,400mAh AA NiMH Rechargeable Batteries 8-Pack, model no. MH-8AAI-BH, for $21.99. Coupon code "EMCEFFK28" cuts the price to $15.99. With free shipping, that's tied with our October mention as the lowest total price we've seen. (It's a current low by $9.) They're pre-charged and can be recharged up to 1,000 times.