Have brightness set to full on all my apple products and auto off
My brightness is about 40% with auto brightness turned off.
I've had multiple Apple employees tell me that using auto brightness takes more power. After turning it off, I found this to be true in my experience. I gained about an hour of usage on a charge cycle.
This and making sure the "ask to join wifi" is turned off as well.
Have brightness set to full on all my apple products and auto off