Just an observation on AA batteries and camera use. Many moons ago when I had on Oly compact which took AA batteries, I found that it chewed through std alkaline AA batteries really quickly, and it was only by buying NiMH rechargeables that I could rely on a decent charged period. The lithium Batteries for my lumix are very small, can last all day (300+ photos?) and available for ~£7, currently; I have three. Li-Ions also hold there charge well, unlike many NiMHs. So I guess I'm saying, one really does need to be in the total wilds, and without a portable USB charger to need AAs IMO.