Panasonic Eneloop AA 2100 cycle/2000mah, Ni-MH Pre-Charged Rechargeable Batteries – 8 Pack: $15.59

Possibly cheaper with redcard or other Target-style chicanery (I see a clickable box for an Amazon-style "subscribe" but don’t know any more about it). Not available in stores. FS for orders over $25, plus tax if applicable.
http://www.target.com/p/panasonic…A-14542723