Walgreens stores have the pre-charged Duracell AAA & AA NiMH batteries on sale today and tomorrow for $10.99 for a pack of four. There is also a $5 off coupon for any purchase over $20 available here:
http://www.walgreens.com/hotbuys/default.jsp So, buy two packs and get them for about $16!!!
These are rebranded Sanyo Eneloops folks! Great batteries! Be sure to buy the ones that say PRE-CHARGED. They have copper tops and a white ring around the positive contact on the battery.