2 x AA batt cameras are usually compact P&S type. IIRC, Sanyo has a 5Mp model that uses just 2 AA batt but because of its huge LCD screen, alkali batts only last something like 10 shots or so with some use of the LCD.
The first digital camera I got was a Kodak something something 3500 I think, that model was a 2.2mp with fixed focal that uses either rechargables or litium AAx2.
aiyah, he wants a 2xAA camera which means compact la. Otherwise I'd told him about my S2pro liao. 4xAA for camera, 4xAA for builtin flash, 4xAA for external flash. Same number of AAs as when using my old film with MD12 & flash