Stretch the battery with Low Power Mode
Energy Mode trades a little performance for battery life, separately on battery and on the power adapter.
Tips tagged #battery
Look after the battery of a Mac that lives plugged in
Optimised charging and a charge limit stop a permanently connected laptop from sitting at 100% all day.
Decide when the screen turns itself off
Separate timers for battery and mains, so the Mac neither locks while you read nor stays lit all afternoon.