It is a 2019 model, one of the first MBP 16" made (2019-10-07), bought new in May 2020. Could anyone comment on the battery's 'design capacity', which has always been low-90s% since new? Initially, I ran it on battery between 40% and 80% of full charge, but now leave power plugged in all the time. Should I be sufficiently concerned to take it to my Apple Store for assessment? I know they guarantee batteries to still hold 80% after 3 years ... but it's heading that way. I have a feeling the battery may have been sub-standard from new, not helped by lying unused for 7 months before sale, a point I could make to the Genius Bar. Thanks.