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6 Nov 2014 This is an update to my post regarding monitoring your battery. After 2 weeks, we got our C-Max back from the dealer after our first battery failure. Our Cause: 1. The Dc/DC converter that charges the battery seems to have failed and was replaced 2. The battery was dead and was replaced 3. They could not get the proper 14.4+ volts across the battery. They were getting some where near 13.5 V Cause: Replace a high power/amp fuse with the heavy cable. After the fuse was replaced, everything worked again. A thermal camera would have shown the component that was hot or dumping the battery power. Outstanding issues: Nothing here fixes the battery monitoring system and low battery setting of 12 Volts. I suspect that this will require a software upgrade Yes, the Engineering test mode has a battery or voltage monitor. We are now getting 14.3-14.4 V. You can't use it while using the standard instrumentation. You can only access it at startup while holding the ok button. The coolant temp is also there but not much good unless you leave it in ETM. So I still want an accessible battery and engine coolant gauge while I am driving down the road. Ford has come through for us in fixing what appears to be the root cause of the battery failure ie a short in the fuse. I will give you the name when I get it. Trust all will be okay in the morning. I am still going to use our 12 V battery monitor while driving to make sure everything is working okay. Way to go Ford. Our lives are surely worth more than $2.40 as per GM while the GM pig CEO made $42 million a year. Now fix the BMS alarm. These may NOT be the only causes of a failed battery but they appear to most likely what is causing a lot of people problems. One person related wires damaged from a leak of the water pump.