Still 100% charged after introduction of battery health management

buckeyes20 wrote:

However, I have observed periodic short discharge (about 15 minutes) and recharge cycle, and also observed reduction of full charge capacity (a.k.a. battery health) reported by coconutBattery (and iStat Menu) down to 92%.

This is the normal pattern with Battery Health Management. It allows your battery to remain at 100% but periodically (maybe once per day) executes a short discharge of 8-10% and then recharges back to 100%.

In looking at your table of battery health, I feel that it shows that there is some degree of "inaccuracy" in the estimate of battery health (full charge capacity). While it is true there appears to be a decline from 98% to 92% over a short time frame, notice that the "health" earlier declined from 100.7% (greater than 100% ?) down to 89% over just 10 days.

Here is a record I have for two laptops, one a 2010 Macbook Air, the other a new 2019 Macbook Pro. Note that the older Macbook Air has seemingly improved over the past 3 years! Is that physical? I seriously wonder if any of these readings are good to better than +/- 10%!

I am not an expert on this. But I have observed this on two Macbook Pro 16" laptops and it's very repeatable. I have also read anecdotally in the forums others' posts stating as such. In fact, at this moment, my laptop stop discharging when it reached 92%, while I was typing and just began to charge back up to 100%, as it seems to do every day at about this time ...