Battery discharges while being plugged in at 100% / Battery draining while plugged in

Hello,

I'm not exactly sure this is an issue. More like a battery management thing, try turning off Battery health management in Settings > Energy Saver > Battery Health to see if this "issue" still persists.

https://support.apple.com/en-gb/HT211094?cid=mc-ols-energy_saver-article_ht211094-macos_ui-04022020

Hello,

I'm not exactly sure this is an issue. More like a battery management thing, try turning off Battery health management in Settings > Energy Saver > Battery Health to see if this "issue" still persists.

https://support.apple.com/en-gb/HT211094?cid=mc-ols-energy_saver-article_ht211094-macos_ui-04022020

I decided to just try it tonight - so I turned off the new Battery Health Management :D

Plugged the laptop in, watched it go up to 100% and that's where it's been sitting all evening, no dips down to anything below 100%.

It seems pretty safe to say it's the BHM at work we're seeing here.

I also spoke to Apple Support about the identical experience I have/had (battery level oscillating between 90-100% when AC is always plugged-in, battery is not charging between 90-100%, SMC reset not fix it...etc). The customer service mentioned nothing about the BHM feature and arranged for me to send in my MacBook Pro for repair. I sent it in and only to have it returned to me one day after service centre received it with a note "can not reproduce the charging problem" and "passed all diagnostic tests"....

The evidence seems to support that this is the new/current charging behaviour, it was just a bit curious that Apple Support didn't advise me about the BHM feature and wanted me to have the MacBook Pro checked by their service centre when I approached them about this issue.

I'd previously disabled BHM to see what would happen (see my most recent post: battery stayed at 100%) and tonight I turned BHM back on again.

After a restart, the battery is once again slowly draining despite the laptop being plugged in.

My first thought was that it almost seems a little like how you're supposed to start a car in storage every now and then to make sure it doesn't die and gets some "exercise" rather than just letting it sit there.

Jokes aside, it really does seem like it's the BHM - and I agree that some clearer communication would have been/would be great.

I have disabled BHM and I continue to see the problem after disabling BHM. It seems that the problem is completely unrelated with BHM. I have a MBP2020 13 which now 1 month old.

When it starts discharging, the only way I found that to make sure it is recharging again is to put it in standby. After standby it typically (90% of the times) starts charging again. Otherwise the recharging is completely random

from another person

I spoke to Apple support just now.

I explained the situation and asked if the whole "discharging to ~90% and then recharging" thing was BHM at work.

Here's a screenshot:

I then asked jokingly (as I did in this thread as well) if it was like a car in storage that you're supposed to start every now and then. Here's what he said:

I still think this should have been communicated officially but personally, that confirmation of what some of us had already assumed in this thread is enough for me.

I hope that helps :)

Guys I have some update from Apple store Amsterdam, I left MacBook to them for further testing, after two genius appointments, they called me at the end of next day, says: there is nothing wrong with hardware after several testing, they told me it is completely normal that battery percentage behaves this way, no matter battery health turned on or off. The person who called me is the same person who tested my laptop, he told me that nothing to be worried.

I will see if I get an official repair report or something from Apple after I pick up the machine, I will share with you guys

I can't guarantee anything, of course, but personally, I'm kinda relieved to see the correlation between turning BHM off/on and the battery behavior changing.

I read a bunch of other forums (via google search, can't remember the names) and people seemed to come to the same conclusion everywhere. That is what gave me the idea to try turning BHM off in the first place.

My Mac isn't massively older than yours and it does the same thing - down to ~90% before charging again. I can tell you, I was pretty worried I'd have to get it replaced a week after buying it.

My partner's Mac (not even a month old) does it too. So it does seem to be normal at the very least.

I have disabled BHM and I continue to see the problem after disabling BHM. It seems that the problem is completely unrelated with BHM. I have a MBP2020 13 which now 1 month old.

When it starts discharging, the only way I found that to make sure it is recharging again is to put it in standby. After standby it typically (90% of the times) starts charging again. Otherwise the recharging is completely random...

Did anybody tried the new 10.15.6 beta to see if the problem is still there?

Hi

I have spoken to Apple and I been told it should not be doing this. the battery on mains will not be damaged so should not need to drain and then go back onto charge on its own doing.

I have been told to put in safe mode - as my MacBook does it a the same time every afternoon, to see if it does it in safe mode.

if it does not do it in safe mode, I will then have to see if it does it on Friday while being plugged in.

I will keep you posted on this, please do the same,

thank you

I have been told as in still occurred in safe mode,

Reinstall as new system, if this does not work to return as only 7 days old,

Has any one tried this wiping and starting again to see if it still occurs?

thank you