My battery has croaked. I wish I had seen it coming. It would have been foreseeable perhaps if I had some sort of voltmeter, or ammeter or some such gauge to monitor the condition of my charging system. So, once the monsoon season ends & I can work without getting soaked, I will install something. So, this will give me time to research. Has anyone here installed some type of gauge like this in their 123? I am assuming that the installation will be simple, but then again...What did you install? How did you install it? Is there a particular gauge that will work best? Who makes the best gauges?