I bought one of these a few years back, and it has been perfectly reliable. I keep it on the motorcycle. Accutire MS-4021B Digital Tire Gauge I have now bought two since, and both have been bad, right out of the package. I've taken the batteries out of the good one, and put them in both of the bad ones, no change. Plus, the batteries out of the new ones that don't work, are fine, when placed in the known good gauge. Both of the bad ones came from different vendors. The last one came from Amazon. Has anyone else had bad luck with these? Two bad ones... brand new, right out of the package... shows that this company might have a QC problem.