Mac OS Sequoia drains the battery by 2% every 15 min. No issues on Ventura.

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

By looking at the report we can see not only what is likely using more energy, but also other issues like old stuff that may have worked on older OS but be causing trouble in Sequoia.

Does Activity Monitor.app (View > All Processes) report any CPU intensive tasks that drain the battery when the Mac should be idling?

AlexGrec wrote:

I did fully clean install both of those OS (Ventura and Sequoia) Ventura lives without power adapter about 5 days (I did my ordinary tasks). Sequoia - 2 hours. Hardware is the same. No third party software installed.

Respectfully, one may want to revise that statement

Unsigned Files:

Running app: com.CodySchrank.gSwitch-LaunchAtLoginHelper

[Loaded] us.zoom.ZoomDaemon.plist (Zoom Video Communications, Inc. - installed 2024-05-08)

Executable: /Library/PrivilegedHelperTools/us.zoom.ZoomDaemon

User Launch Agents:

[Loaded] com.google.GoogleUpdater.wake.plist (Google LLC - installed 2024-08-28)

Command: ~/Library/Application Support/Google/GoogleUpdater/Current/GoogleUpdater.app/Contents/MacOS/GoogleUpdater --wake-all --enable-logging --vmodule=*/components/update_client/*=2,*/chrome/updater/*=2

[Not Loaded] com.google.keystone.agent.plist (Not signed - installed 2024-05-08)

<Empty>

[Not Loaded] com.google.keystone.xpcservice.plist (Not signed - installed 2024-05-08)

<Empty>

[Loaded] com.synology.SynologyDrive.plist (Synology Inc. - installed 2024-10-08)

Command: /usr/bin/open '/Applications/Synology Drive Client.app'

[Not Loaded] com.atrix.launcher.rusvpn (FREE VPN PLANET S R L - installed 2024-05-07)

Modern Login Item

/Applications/Planet VPN.app/Contents/Library/LoginItems/Launcher.app

[Not Loaded] coconutBattery Menu (Christoph Sinai - installed 2024-05-07)

Modern Login Item

/Applications/coconutBattery.app/Contents/Library/LoginItems/coconutBattery Menu.app

Building on an earlier posting by @ Luis Sequeira1 re CleanMyMac

To put the CleanMyMac in context and the damages it may have or has already done.

This application can or will Muck Up your User Account ( Home Folder ) of this machine.

It does not touch the Operating System itself unless you consider your User.

 Account ( Home Folder ) as part of the Operating System

Then in that specific context - it has Mucked Up the Operating  System 

In which case, the Operating System is hosed

Ok and only out of interest

coconutBattery

What does coconutBattery report regarding Designed Capacity versus Actually Capacity ?

Ventura is a smaller operating system with substantially fewer system processes running than Sequoia. Clean installations won't matter if the operating system is normally doing more with your CPU/GPU, RAM, and Storage access. Apple simply is not making smaller operating systems that do less… and on the same portable hardware that equates to more battery drain per unit of time.

The applications of third-party vendors that incorporate new Sequoia features into their applications won't improve your battery drain either. This evolution has been going on for years…

CarlosIbarra wrote:

i have the same problem with a two month old MacBook Air 15" M2 with only 10 battery cycles ! its a OS problem! mine drops 1% every 15 minutes doing nothing ! I only have 4 apps installed (any desk, kicad 8, vsCode and Xcode) and almost empty ssd! prior to update to sequoia my battery last a week! dropping only 1% every hour or 1 and half !

If were were to take your figures as 1.5 % drop / hour into 100% Battery charge.

That would be 66.66 hours runtime while in use

66.66 hours divided by 24 hours = 2.7775 Days

All the above is predication on the computer as being On and in Use

Follow the advise from @Luis Sequeira1 and post the report

On the off chance, a 2018 MBP Intel in 2024 = 6 years of age

How many Full Battery Cycles that this machine experienced over its' 6 years lifespan ?

Batteries are considered Consumable Products.

Over time it will degrade to a point where it needs to be replaced.

Apple Batteries are rated for 1000 Full Battery Cycles and / or 80% Capacity before needing Evaluation or replacement.

Add on after further review of the report

PowerMyMac specifically

If I understand what this application purports to do.

It could be akin to the infamous CleanMyMac aka BrickMyMac

That last point in below is of concern to these old eyes " Fully Notified by Apple "

If we use the figures >> Designed Capacity 5088 mAh versus Full Capacity 3990mAh .

That would indicate the battery has about 78% Capacity versus Designed Capacity

Realizing, CoconutBattery is only reading from the Builtin Sensors of the computer

Well within the 80% Threshold earlier mentioned

Don't fall for stuff like "PowerMyMac"! This is predicated on the false notion that your mac needs "cleaning" or "optimizing" by a third party application. I had not heard of this particular application, but since it places itself as a "competitor" to CleanMyMac - and this one we know is terrible (having earned the moniker brickmymac, as PRP_53 mentioned), I would not install it, let alone use it.

You mentioned 2% in 15 minutes - if we extrapolate that to 100% it would give more than 12 hours! Now, that for a 6 years old mac is not bad at all!

My 2019 16" Mac, with a much larger battery (albeit also a larger screen, of course) will hardly last 4 hours, let alone 12.

At this point, I don't see any obvious big waste of energy. Maybe your mac lasted a bit longer in Ventura (but not 5 days, ever - unless you put it to sleep or shut down for most of the time), but it seems to be working quite normally.

i have the same problem with a two month old MacBook Air 15" M2 with only 10 battery cycles ! its a OS problem! mine drops 1% every 15 minutes doing nothing ! I only have 4 apps installed (any desk, kicad 8, vsCode and Xcode) and almost empty ssd! prior to update to sequoia my battery last a week! dropping only 1% every hour or 1 and half !