I have a 640x480 Polaroid and a 1.3Megapixel Olympus. I bought both of them off of ubid cheap, as refurbed units. (I got the Olympus because I wanted something with some more exposure control, and some zoom.) I agree, the NiMH's are great. ALthough my Polaroid eats thru them so fast I wonder if it's normal. Maybe it's just cause the battery meter loses the 1st two of the four "segments" very quickly and makes it look like they're dying quickly.
On the other hand, I got the Olympus in February and it still has the same set of Lithium batteries that came with it, and the battery meter is still on full. So I agree that lithium batteries aren't cost-effective for the casual hobbyist whose camera can use AA batteries, but my experience suggests there is a difference in the battery life, and it's not just hype.
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