Reporting back: I took the time to test my MBP performance in the weeks prior to and after my Genius Bar appointment recording battery life percentage every hour during my workday, screen brightness, apps in use, duration of use, peripherals connected etc. so took a bit longer to reply this time.
I completely wiped and did a fresh macOS install, zero apps installed prior to appointment to get a baseline.
Good news and bad news after appointment :
- Apple ran a diagnostic and could see something wasn’t right immediately as reported battery life was about 1/4 less than they expected despite battery health and reported hardware condition being optimal
- Had to leave my Mac overnight for fresh firmware reinstall for t2 chip etc and for further testing
The result of all firmware updates was… mixed. I restored my Mac with time machine when I got it back and have observed the following in the past 3 weeks since my appointment:
- I don’t get battery drain overnight anymore but that was fixed during 12.2 for me so the firmware reinstall wasn’t responsible for this
- increase in battery life (approx 3hours greater) during ordinary browsing, YouTube streaming, music app etc however macOS 12.3 installed halfway through testing period so I can’t be certain that this increase in battery life was solely due to firmware update
- no change to poor battery life when using the MBP for work. Still average about 8 hours use before I hit 20% battery time remaining.
- When using my partners identical machine with identical apps, I achieved 50% remaining after 8 hours use. When she used my machine she was left with approx 20% - so battery life isn’t down to individual use patterns
Not sure how to explain this one. I seem to get improved battery life during casual use so that’s a plus. The zero change for productivity is a bit of a bummer.
Considering the amount of people getting similar battery life to me I’m putting this down as normal and expected performance for the MBP 14, and suspect my partners MBP battery performance is the outlier here and a simply a case of her having won the silicon lottery.
I’ll still keep the machine. It’s an impressive little thing and I’m hoping future updates to macOS and to third party apps claws back some of that battery life.