Why does my battery still charge 1% a day when over the charge limit?

[andrewcrook]

When I shutdown I turn the power off at the wall.

MacBook Pro (13-inch, M1, 2020)
macOS 12.3 (21E230)
AlDente Pro 1.15.2 (Lifetime License)

[andrewcrook]

oh yes I have disabled macOS’s battery optimisation BTW

[MatthiasKerbl]

Hi @andrewcrook,

My guess would be that there is always a little bit of charging when you turn off your MacBook and shortly after turn off power. The same when you turn it on again. This could explain why it keeps charging just a little bit every day.

Cheers,
Matthias

[andrewcrook]

@MatthiasKerbl

yes that’s what I am thinking.
I am just a bit surprised that it charge 1% in such a short amount of time.

[Bachsau]

Li-Ion batteries are built to charge fast. However, part of it may also be a measurement error. You can't reliably measure the charging state of a battery in such accuracy. That's why it needs calibration from time to time. I guess if you just used standby instead of shutting the system down, that would prevent the unwanted charging.

[andrewcrook]

guess if you just used standby instead of shutting the system down, that would prevent the unwanted charging.

Yes that’s what we determine the M1 power system is quite different. It resets on boot.

[andrewcrook]

Li-Ion

Li-Poly*