Not to pick on the OP here, but I have never understood the hand-wringing about batteries in cameras. Regardless of which camera I have with me, I carry a set of spares. If the batteries die, I replace them and keep shooting. Just like when I reach the end of the roll of film, I replace it.
Well i've just bought a battery like that. And it costs 7euro for one battery. So replacing them after each roll will make it a bit expensive isnt it