Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
BATTERY DRAIN overnight worsening (2015 13MBP on 10.13)
- Thread starter TSM
- Start date
- Sort by reaction score
Not by cycle count, for sure! Just 33 (and a good portion of them precisely caused by this issue!).
Appreciate it!
Those two first are granted when disabling the 'power nap' option or is there any other option I should tinker with?
(And yeah, the latter may be dangerous as you point out).
Duh, sorry, you only pointed that out like 6 times.
I recently upgraded from Sierra to High Sierra and instantly noticed a significant change in sleep. Under Sierra I might lose 4% overnight, but under High Sierra it's anywhere from 8% to 12% I'd estimate.
There's a million threads about sleep settings, and you've probably look at them. You know how to check App Nap? How to disable Power Nap I'm assuming. The Preventing Sleep indicator in Activity Monitor? Assuming you're familiar with all this stuff, then I would consider:
1- go back through the power settings again. Toggle them all to change them to On or Off or whatever is the opposite of what you want, then reboot, then toggle them back the right way. If there's a messed up preference somewhere this might fix it.
2- NVRAM reset (booting with Command-Option-P and R).
I'm planning on doing those things. And then if that doesn't work I'm thinking a clean install of Mojave once the .1 or 0.1 is out.
If none of that makes sense let me know, but you've been here a while so I assume it does!
There is also a way to disable the wake-up that occurs every two hours. There is a side effect of losing the tracking ability in Find My Mac (losing or limiting, I'm not 100% sure which). That might make the issue go away, but at the expense of Find My Mac accuracy. EDIT: I see dreubencr pointed this out already!
If you have a three year old laptop with only 33 cycles, you probably have it plugged in constantly. Battery tech is supposed to be good enough now that you can get away with this, but I think it's still a good idea to allow your battery to get a "workout" once in a while. Most of the lithium ion battery that I kept plugged in constantly eventually became erratic despite their low cycle counts.
But, you might have some sleep wake issue causing your computer to churn. This is especially true if you run a lot of software. The more software you run, the more likely your computer is doing something when you think it's sleeping.