My 18 month old 13 mini is running 18.1 and has been off charge for a little over ten hours. I’ve barely used it today as I’ve been at my desk with my iPad and work Mac, but the battery is at 63%.
My year old iPad mini has been off charge for a couple of hours, during which I’ve been typing in a Pages document using a regular Logitech keyboard and mouse hooked up via dongle. The battery is at 58%.
Something ain’t right with the drain in 18.1.