If your camera, like mine, takes stacked LR44 batteries (expensive at camera stores) and you live in New England, then you're in luck. Ocean State Job Lot has them in packs of 3 for $.99. There are stores in MA, RI, CT and NH. Check out the website for locations:
Buy 20 packs. You may never need batteries again. At that price you could leave your camera meter on for days.*
* Not recommended by APUG.