My battery in our plane failed to start the plane after arriving to my home field from a 20 hour cross country. After testing the starting system I found the 1 year old Odyssey battery had 12 volts across the terminals but would drop down to 3 volts while cranking the engine. I had the battery tested and it failed miserably to produce enough power to turn the engine over.
I downloaded all data files from my 4500 to find any information that could show any evidence of a dying battery. The only thing I could find was evidence of the backvolts dropping from 12 to 8 volts during the last fuel stop before landing at our home field.
Would their be any sign on my 3400 engine monitor that could give me a clue of a pending battery problem like this?
I was just glad the problem waited until I arrived at our home field and not on the ramp at Key West Florida.