Battery Low Warning

So I had my accessory on while I was trying to figure out how to delete old destinations in Android Auto since there's no icon on my phone it just runs in background (couldn't figure out how to delete the destinations) but after only five or six minutes I got a warning on the instrument cluster "battery low turn off power). I checked the battery voltage and it was 12.7 which is 100% or near. So why did I get the warning?

 

Nany warning to remind/scare you that power is being used and not replaced

 

Thanks. This was an actual message in English not the kindergarten drawing icons which was nice because that's why I went to school, to learn to read not to decipher hieroglyphics. (you can probably tell icons are one of my pet peeves). I looked through the manual which is only twice the size of War and Peace and they had a section full of the actual words in English warnings and it was not there or anywhere else. So I was stumped.

 

If it's the message I saw last week while I was sitting in accessory mode listening to a podcast while waiting for my kid to finish her piano lesson, that's not what it said. What it said was something like "turning off to save battery power" or something like that. That is, after a few minutes, it turns itself off so you don't run the battery down, not that the battery is run down.

 

Mine read "Low Battery Turn Off Power".