what is 2018 macbook air usb c cable capacity 30w

They do this by putting a protocol other than USB-PD over the USB port. Some non-Apple devices will allow more than 12 watts per USB-A port, such as Quick Charge and PowerIQ. That Anker 60 watt USB power brick? That's 60 watts because it's 5 ports times 12 watts per USB-A port.

If there is a USB-A connection anywhere in the chain from the wall outlet to the Apple device then the power will be limited to 12 watts. It doesn't matter what the power rating of the power supply is, an Apple iDevice will draw no more than 12 watts from a USB-A port.

Quick Charge and PowerIQ power bricks will not work unless they explicitly state they are USB-PD compatible. Another important point, Apple iDevices use USB-PD (power delivery) to get more than 12 watts from any USB-C power brick or dock. Here's one important detail that will answer a lot of your questions, Apple iDevices will draw no more than 12 watts from a USB-A port.

So now the question is, if I go out and buy say the Apple 87W USB-C Power Adaptor and plug it in to the hub will in finally start charging through the hub? I plugged the Apple 30W USB-C Power Adaptor into the hub and I get AC Charger Information: If I connect it directly to the Macbook Air it just says AC Charger Information: I made the assumption, I guess wrong, that given the power adaptor that comes with the Macbook Air is 30W that this Anker 60W would deliver enough power. First off I'm using an Anker 60W Powerport 6 as power. In either case the Macbook Air shows AC Charger Information: I tried a VANMASS 9-in-1 USB HUB and a Sicotool 8 in 1 Type C Combo USB C Hub Adapter

I bought 2 hubs and neither seems to be able to do this. In other words I want to plug the hub into my Macbook Air and the power into the Hub ->->

What is 2018 macbook air usb c cable capacity 30w