Charging with PowerBank 18W

[meshaun]

Hi people!
I bought the MBA 2020 M1 and I am loving it.
Even though I have the charger and the cable that came with it, I am shifting home to work and vice versa daily. So, I was thinking, I need a secondary charge option when at Home, to leave the charger at office as is.

I have a Mi Power Bank 18W and since it has a Type C port output, I was able to charge the MBA once. Well, I know that the MBA comes with 30W charging, but does it only make the charging time twice longer?

Also, I have the Type C cable and usual chargers for the phone (33W charger).

My question is, should I only use the 30W Charger and the Apple Cable or is it safe to use the powerbank or the phone charger with the original cable?

 

[JPack]

Yes, the power bank will work safely to charge the MacBook Air. I use a Xiaomi 30,000 mAh bank with the same 18W output. But even an affordable 20W Anker charger will keep the notebook running.

 

[jz0309]

the power bank will work, but it is extremely inefficient to charge this way, meaning charge a battery to charge a battery ...