The eled head is only for ~6v lights, 4aa and 2x123 lithium It MAY work with 2AA but expect it to be rather dim and all but useless. As for the Uk4AA eled head you can get them at brightguy.com and premierproductsonline.com. have them for around $14-15.00 or you can buy the light with the LED for about $20. I myself would recommend just buying the ELED whole light and use what body you want with it, keeping the other for incan use. The premieronlineproducts.com sells an ELED right angle light for about $2-3 more I think. I don't know of anyone that has ordered from them yet though.