Driving drunk is certainly not a smart idea. You could not only put yourself and others in danger, you could lose your license and end up in trouble with the law. There is nothing wrong with being into partying much. Tools such as the iBreath Breathalyzer show you when you have gone overboard. It reads your breath alcohol level fast and tells you when you simply should not be driving. It covers a 0.000 – 0.200% BAC range. It does not need any battery.