Ancestors

Written by Stuart Langridge on 2025-01-20 at 18:01

I've got a macbook. I don't use it much, and it sits on the side desk. Yesterday I charged it to 100% (which I had to click on a thing in the menu to allow; it only wanted to go to 80%) and then afterwards unplugged it and closed the lid. Today I've just opened it and it's at 1% charge. Do they not suspend properly or something? Surely it shouldn't use battery power while the lid is closed?

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Written by Chris Adams on 2025-01-20 at 18:06

@sil it doesn’t drain in normal use - mine will last two weeks closed losing only a couple percent - but apps like PowerPoint or conferencing apps can prevent full power saving mode. That should show up in the energy usage history, though.

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Toot

Written by Stuart Langridge on 2025-01-20 at 18:13

@acdha hm, what's the energy usage history? I have a "battery level" graph (which shows a precipitous falloff after being charged) but nothing about which apps might be causing it.

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Descendants

Written by Ross Burton on 2025-01-20 at 18:18

@sil @acdha Check Activity Monitor for anything eating processor, but it looks like your battery is fucked mate.

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Written by Stuart Langridge on 2025-01-20 at 18:21

@ross @acdha fair enough. I assume that the bit which says "battery health normal" is just full of lies and not to be relied upon?

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Written by Chris Adams on 2025-01-20 at 18:29

@sil @ross I treat that as a reliable positive indicator but an unreliable negative. You can see if the diagnostics turns up anything else but if there isn’t a sign of an app preventing sleep it’s the best theory:

https://support.apple.com/en-us/102550

pmset can display the log of assertions which prevent power saving:

https://ss64.com/mac/pmset.html

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Written by Stuart Langridge on 2025-01-20 at 18:51

@acdha @ross good thought; I'll try the diagnostics.

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Written by Stuart Langridge on 2025-01-20 at 18:56

@acdha @ross diagnostics say there's nothing wrong (as you predicted).

Amusingly, now I've restarted, Activity Monitor crashes when run with an illegal instruction. So that's helpful, not.

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Written by Marius Quabeck :verified: on 2025-01-20 at 18:55

@sil @ross @acdha try coconutBattery, it gives a much more reliable output and tells you the remaining capacity and cycles of your battery or you could have a look in the system report app

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Written by Stuart Langridge on 2025-01-20 at 18:59

@marius @ross @acdha that seems to think things are ok? Maybe I'm misreading it.

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Written by Marius Quabeck :verified: on 2025-01-20 at 19:05

@sil @ross @acdha ok-ish indeed. Definitely still intel but still supported even so I’m not surprised that it drains faster with current macOS. Try this next time: unplug it before shutting it down, otherwise it will just boot back up, drain the battery and go to a deep power save mode that you get greeted from with only a few % battery remaining months later. https://apple.stackexchange.com/questions/449084/macbook-pro-starts-automatically-when-charger-is-plugged-in

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Written by Chris Adams on 2025-01-20 at 18:25

@sil activity monitor had an energy tab which should show per-app usage.

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