I've had about a half-dozen Snark tuners, bought a few of the Reverb-branded equivalent when they were blowing them out. I don't know what the deal is, they all just chew through batteries like crazy. I keep CR2032s on hand -- seems like I put in a new battery, tune a couple of times, and when I come back to the tuner a week or two later the screen is dim, hardly useable. It's happened to pretty much every tuner of this type I've had. I have a hard time believing it's just me -- would be interested to hear your experiences/recommendations.