I’d appreciate feedback, please, whether this is something peculiar to my machine or more widely known / experienced. Any further hints and tips would be a bonus!
I am using a MacBook Pro 15-Inch “Core i9” 2.3 Touch 2019 2.3 GHz. Since updating to 15.3 from 15.2 it has been reporting its battery charge erratically. Yesterday I saw it was at 1% so I immediately put it on charge, whereupon the charge was displayed as 51%. Something similar happened today and I recorded the battery charge - please see the attached screenshot.
After 09:17 the machine was not connected to the charger, but the charge (apparently) went from ~70% to ~25% in next to no time, then back up to 45%, then down to ~15% and then up again to ~25%.
It seems to me probable that it is the very low readings which are erroneous as the green lines in the screenshot show the sort of linear decline one might reasonably expect.
What do you see if you click the little “i” in a circle at the end of the Battery Health line? My suspicion is that your battery is starting to fail (despite being diagnosed as “Normal”), and seeing the Maximum Capacity number might inform that hunch.
That’s odd. You’re on macOS 15.3…maybe Maximum Capacity only appears on Apple Silicon machines? Anyway, coconutBattery has the number. 75% isn’t great, but it isn’t so low that it is the likely source of the problem you’re reporting.
But hold on…coconutBattery is also reporting your battery’s manufacture date as three years after your computer’s. Is this a replacement battery?
Yes, I’d forgotten that. I had the battery replaced mid 2023 by Apple. 18 months for an Apple battery seems a bit short.
That said, a) this only started happening after the update to 15.3, b) it seems very odd that coconut battery is reporting a different charge condition to Apple’s own software in System Settings (see screenshot), and c) how the charge goes from 1% to 15% without external power is a mystery.
