12v usb socket

I have 2019 and I noticed my USB CarPlay hub “not” working correctly. It does work but I’m at a lost on why it works for some devices and not others? Hopefully someone had this experience or has an idea of the problem. And fyi, Apple support is dogs#it and useless. These are the issues. Left...

EN50155 type test is to do environmental adaptability test, electromagnetic compatibility test, electrical safety test and other testing items of electronic equipment of railway vehicles. EN50155:2017 can be applied to all control, regulation, protection, diagnosis and other electronic equipment...