I'm using a model Macbook Pro 15 "2018. I want to use a wired internet connection.I have tried using 2 different USB-C hubs to achieve it.Both are USB-C type to Ethernet, as well as some USB-A 3.0 ports (SD card slot connectors on one of them) .They have considerably depleted the battery life of my Mac, for example by having it almost halved, when I only used the Ethernet port.
Today, I also have a USB-C to pure Ethernet adapter (not a hub). This does not seem to drain the battery as much as the hubs, but the same problem persists. I hoped it would be better and I will test it a bit more tomorrow.
The fact is that without the Internet connection via USB-C to Ethernet, the battery life is perfect. It seems as good as advertised, actually, about 10 hours or so. I did not do a real test to see how long it really took before stopping, but it is still noticeably better. Even Wi-Fi seems to use less power than USB-C over Ethernet.
Does anyone know a solution to this? Should USB-C to Ethernet connections on Mac drain the battery? Or could it be a software problem? I have often tried to look for a solution on the internet, but it seems that many people do not even encounter this problem with this type of adapter.
Thank you very much for any help, and best regards.