M1 MacBook Airs with 20W chargers

[johnediii]

So, I thought I posted a while back that the school I work for got our shipment of 130 M1 MacBook Airs for next fall in and Apple sent 20 watt chargers that I would call iPad chargers. Over the summer, we take in all of our MacBooks and do several things to prepare them for next year. We clean them. We make sure they are up-to-date and we run a quick offline MRI on all of them. Well when I started doing MRI with the 20 Watt charger, the M1 MacBook Airs are failing the MRI with an error about the charger. Has anybody else seen this?

 

[mi7chy]

I use an 18W charger which works fine with M1 MBA so 20W should also be fine. Probably a false positive where it expects to see the stock 30W instead of 20W. Best to contact Apple support for clarification.

 

[johnediii]

It definitely charges the computers fine, it just fails the MRI every single time.

 

[kitKAC]

The standard charger is 30w, you should be asking Apple why you weren't sent those chargers.

 

[JPack]

The 20W adapter lacks the 20V output which is available on 30W. It probably dips into battery under high loads at full brightness.

 

[Isamilis]

I use Anker Nano Pro 521 for MacBook, iPad and iPhone. If you plug 1 cable, it will charge at 40w. If both slots are plugged, it will charge 20w for each. I tried both and no problem so far. It’s also smaller and lighter than original Apple’s 2 port block.