Hello all,
Here is my experience. I use the 2020 M1 MBA and this machine is a beast! Well, an efficient beast.
I charged it using my Pixel3XL stock USBC adapter rated at Output: 5V 3A/ 9V 2A (which makes it 18 Watt in fast charging)
I have attached my charging history from 60% to a full. I didn't want to compute the time it took to charge because of the weirdly divided time steps on the graph. Anyone curious can calculate it if they want.
I was doing some heavy browsing- about 10 tabs open on average(Searching papers, reading PDFs, typing documents) connected over WiFi while charging.
I have also attached my activity monitor to show the apps I was using.
Conclusion: Heck yea you can use any wattage USB C adapter (Better be from the good manufacturer adhering to the USB C standards). It would provide whatever power it can. It may charge the battery if the power usage by the machine is lower than the provided power. I would probably not recommend it for full-time use though.
I hope this helps this thread
