Unfortunately we have a camera that sucks the life out of batteries. Despite the fact that this is rather frustrating we don’t have to feel terrible about wasting batteries because we use rechargeable NiMH batteries. They might cost slightly more to begin with but you can use them usually 1000 times or so before they die. Normal batteries of course do not last that long and you have to keep buying them and disposing of them.
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We use rechargeable batteries most of the time as well. The only alkaline battery I purchase are those 9V square ones for the smoke detectors.