ORIGINAL: Rodney
There are no AAA packs with that capacity that I know off. You may have to to to AA.
Untrue! Look here.
http://www.batteriesamerica.com/newpage8.htm#RECEIVER PACKS
Halfway down the page. Quite common battery actually.
HR-4U-1000 1000mAh (AAA)
Super high capacity & high quality in AAA size 4.8v with leads: $16.00 BUY
4.8v with connector: $19.00 BUY 6.0v with leads: $19.00 BUY
6.0v with conn: $22.00 BUY