And I can tell you that you might have about 25-30 minutes of run time on a good battery before everything starts shutting down.

This is really something that I think needs to be reported to NHTSA as a problem because it is a dangerous problem that can render the vehicle incapacitated WITHOUT a specific warning about a charging problem or the engine shutting down.

You WILL get plenty of warnings about subsystems shutting down, but I even doubt there will be a warning when the engine finally shuts down.

Luckily I was able to find a spot on a road that had no shoulders due to construction and I decided to pull off probably just in time before the engine shut down. And if you read my account the battery was depleted enough that the engine would not restart and luckily I had my portable jumper battery and a BIG one at that.

The nice thing about the UltraGauge is if it does not come out of sleep mode, you likely have a no charge at start up, but it will not give you a specific warning unless you unplug the UG and then plug it back in, this will force a restart of the UG and if you have threshold alarms for Voltage, they will trigger. This is the only downfall.

I may just make up a low Voltage alarm in the long run because this is not something that you can rely on for a wife or teen to watch out for.

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2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.