What kind of charger are you using?

[Zazoh]

With 60 watt, my MB Air will draw 37, marginal increase.

 

[Stow]

I just purchased a 108w satachi GaN charger to reduce the wall plugs I carry around. Will this be fine to use with my m1 air?

108W USB-C 3-Port GaN Wall Charger

satechi.net

 

[3Rock]

I’m using Apple 67w for my M1 Mac 16 inch

 

[jpallarest]

I'm using fast-charging stock 96w for my MBP 14". Do you guys think it would affect battery life long term?

 

[wilberforce]

When traveling, I use a 20W USB-C iPad charger for my 14" M1 Pro. Small, and is plenty for overnight charging. Charges 20% to 100% in about 4 hours.
Doubles up for charging my iPad and phone (obviously not simultaneously), so I only carry this single small charger and a couple of cables.

 

[wilberforce]

I'm using fast-charging stock 96w for my MBP 14". Do you guys think it would affect battery life long term?

Yes, I think so, to some (unknown) extent. Emphasis on the word "think." I don't claim to know for sure. But here is a reference so it is not just a random ignorant opinion with no basis:

BU-401a: Fast and Ultra-fast Chargers

Battery University™ is a free educational website offering hands-on battery information.

batteryuniversity.com

The Apple fast charger charges at a rate of 1C, which slightly exceeds the rate of 0.8C recommended in that article.