Cut and paste from a previous deal that has been marked as expired.
IKEA has their LADDA brand of rechargeable battery and smart quick charger. They are currently on the IKEA FAMILY price offer list (which rotates/changes from time to time), 5$ off on the Charger and 2$ off on the battery (4 packs, AA or AAA).
LADDA battery and charger have decent reviews online, eneloop is bit better than this but for the price LADDA is winning my money. Note that LADDA has both Low Self-discharge (LSD) and non-LSD battery. Battery with silver color up to half of the height is LSD variant.
Charger review - http://lygte-info.dk/review/Review%20Charger%20Ikea%20Ladda%…
Credit to bargainaus whose text from the previous deal I copied for the one.
Discussion on battery - http://budgetlightforum.com/node/26725
IKEA Family:
Simply Sign up for IKEA Family(secure.ikea.com)
Use the barcode in store that you receive in the email, you get Special product discounts and Product returns for the life of your membership. And its free, unlike Costco.
A comment in the BLF link suggests these may be superseded in the near future with a bit more expensive higher capacity option that looks a lot like a re-bagged Eneloop Pro, If their is any validity to this I have no idea, either way these still seem great value at only $1ea.