Hmm, mine actually holds at around 14v. Although I know it's not that accurate. My 2M radio has a volt meter built into it so I can double check it at start-up. The stock gauge is pretty cheap though. It comes out easy enough. I'd like to eventually change out all of my gauges for aftermarket sealed units. If your Jeep has a cowl leak, it usually leaks into the back of all the gauges which causes them to be inaccurate over time.