Is this normal battery discharge rate during sleep?

[flaubert]

Hi, I'm just wondering if something is funny with my recently purchased MacBook Air 2017 i7 model: to me, it seems like it loses more battery charge during periods of sleep (while not connected to the power supply) than I'm expecting. What I'm seeing, with the original Apple SSD, is the battery percentage remaining decreasing by 5 to 10% overnight. The energy saver preferences call for putting hard disks to sleep, slightly dim display while on battery power, and NOT enable Power Nap while on battery power. If I'm understanding the wording of that last item, it shouldn't be waking up to check for email or try to do a Time Machine backup, since I have not checked that box. The laptop is running latest Mojave 10.14.6, fully patched with all the updates. Edit: yes, I tried resetting the SMC several times per the Apple procedure for laptops without removable batteries.

Per the title, is losing 5 to 10% overnight fairly normal for these machines? I know that I can go in to Terminal and start tweaking things with pmset to improve this situation, but I'm curious whether this is a fairly normal baseline.

Thanks for your thoughts,

Kurt

 

[ghanwani]

Can't say for your machine, but mine is a 2019 and it doesn't lose anything that I notice when it sleeps.

What does Coconut Battery say about battery health? Since it is 2 years old, the battery may have degraded somewhat.

 

[flaubert]

Actually, the laptop was purchased a month ago from Apple as a refurb. I'll have to download Coconut Battery to see what it reports, and post results here later.

 

[sracer]

My new i7 2017 MBA also had relatively high battery drain. At first I thought it was because I keep an SD card permanently inserted (in the past that would prevent an MBA from going into full standby). But it wasn't that. It turned out to be DropBox. I uninstalled that sucker and battery life on standby is back to being stellar.

 

[ghanwani]

My new i7 2017 MBA also had relatively high battery drain. At first I thought it was because I keep an SD card permanently inserted (in the past that would prevent an MBA from going into full standby). But it wasn't that. It turned out to be DropBox. I uninstalled that sucker and battery life on standby is back to being stellar.

How did you narrow it down? What made you decide to uninstall Dropbox?

 

[sracer]

How did you narrow it down? What made you decide to uninstall Dropbox?

I started with things that sit in the background and use the network.