If you're in in search of some good rechargeable batteries, the popular consensus is that Sanyo Eneloops should be at the top of your list. Right now, Dell has a popular bundle on sale -- the Sanyo Eneloop ECH840 Rechargeable Battery Kit with 8xAA, 4xAAA, and a charger is $29.99 with free shipping.
Eneloop batteries can retain their charge for very long periods of time. The Dell product page mentions that these are rated for 1000 charge cycles (making them first generation Eneloops), but users who have bought this bundle report receiving the newest generation of Eneloop batteries rated for 1500 charge cycles .
Many RedFlagDeals.com readers (and RedFlagDeals.com staff, for that matter) have been recommending Sanyo Eneloop batteries for years.