Unstable charging on a MacBook Pro

@hellomacos yep, I actually mentioned that in the post, tried multiple cables and multiple adapters, so yeah, that's not it, wish it was

@darktreno

Hi

Sorry I never saw the bullet points at the bottom XD

After reading all the bits that you have replaced I would take it to a board repair shop or if your comfortable with the board repair side of things as it’s sounds like the charging circuit may have failed in one way or another

The chips used in the circuit (CD3215) can fail if the something goes wrong on the board side of things which can result it this sort of behaviour

Thanks:-)

Ok, that's an option I think, wonder if it's part that can be replaced or I need to change the whole board? Is there a way I can diagnose it myself

Hey, don't know how to post pictures here but there's the link to the screenshot:

https://www.linkpicture.com/q/0EFD6CA0-C...

Can't obtain the usb device at the moment unfortunately.

Well you have an old battery! Batts have a limited life span both by cycles and age. This battery is now six years old, Lithium Ion batts old last around five years at best, while the cycle count is under the 1000 expected max. So you do need a new battery here I would still like to get a better read using the meter to make sure the charging logic is OK.

@danj well not exactly, I mean it was manufactured long ago I guess, but It was never used, I installed it like couple months ago max, and cycles are at 32 now. The problem started before that with old battery that's why I replaced it.

@darktreno - Is not the run time it’s just the age.

Look at it this way… Over time the chemistry of something breaks down. I found an old jar of strawberry jam in the back of my cupboard instead of being nice and Red it was Brown! It was never opened, it’s just sitting back there to be found.

Batteries are sadly no different! Just sitting they breakdown.

But as I explained you still have a second issue which is the key problem which is within the charging control logic on the main logic board. This will require someone who has deeper skills to locate which component/s are failing or some other damage.

@chanki - Why did you do that? The issue is more often the comparator load resistors.

Thank you for answer me! Dan.

I'm not an expert. That's what a nearby private repair shop said.

But It is not repaired ...

This is exactly the same symptom i have.

@chanki - let’s get a better idea what’s going on. Install this Gem of an App CoconutBattery with the charger plugged in under charge (battery is less than 80% charged). Take a snapshot of the Apps main screen posting it here so we can see it.

I upload my battery info @Dan

Thanks. But it's charging watt is different in my outlet watt monitor

@chanki - How is the wattage different? While it might not be exact, it should be close, also ther is a bit of a delay as the SMC is a polled value which is slower than a USB-C power meter will show as it’s a real time meter.

I don’t see any issues within CoconutBattery. I would recommend doing a SMC reset again as it’s possible SMCdidnt get its values cleared when you replaced the battery. Sometimes I’ve had to disconnect the battery, with nothing connected, press and hold the power button a good 15sec to fully drain the logic board.