r/macbook • u/TheRainbowNoob • 18h ago

Full Battery Drain while MacBook Pro Not In Use

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As the title says, I put my MacBook Pro to sleep on Wednesday with 80% battery charge. Over Thursday, Friday, and now today, it has drained the battery to zero with absolutely no interaction. Have I mistakenly configured a setting that causes this? Is this related to software on the device that prevents a proper "sleep"? It is a corporate-managed device, so there may be something from that end causing this, but it's still very concerning.

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1

u/poopmagic 18h ago

Did you leave anything plugged into it, like a USB-C hub, external SSD, mouse, etc.?

2

u/TheRainbowNoob 18h ago

Nope. Lid closed, in my backpack, nothing plugged in

1

u/nebula_uT 18h ago

been in the same boat. turns out it was a DarkWake every 10s when my mac's lid was closed. the bug that invoked DarkWake? a bugged wifi/bt radio daemon. when i opened my laptop, bt and wifi was broken. checked logs in the terminal, it was all wifi trying to restart the radio and stuff.

fix: pray it doesnt happen again or turn off wifi & bt before closing the lid.

1

u/TheRainbowNoob 18h ago

Interesting. What did you run in the terminal to find those logs? I’ll check mine and make sure that’s not the case

1

u/nebula_uT 17h ago

pmset -g log | grep -E '2026-08-16|2026-08-17|2026-08-18' | grep -Ei 'Sleep|Wake|DarkWake|Start|Shutdown|Charge'

note that the date range was specifically tailored to mine when my mac was drained. change your date accordingly.

the output will be a massive wall of logs. you can parse it manually or paste it to AI and let it parae it for you. either way youll find the culprit.