The thing to note... is that at 57% you can pretty much run the air all day unless you are gaming. We also have to change our mindsets / habits around what a battery percentage is on the new M1's... in the old models I'd totally freak at 57% and want to charge but now these ones... that's over 100% battery usage on an old Mac. Even at 20% you still have a decent 2 or 3 hours and that's even with Youtube usage. It's amazing really.