Macbook Pro late 2016, draining battery while plugged in

You are wasting immense amount of resources running a so-called Virus scanner:

Launchd: /Library/LaunchDaemons/com.avast.init.plist

Executable: /Applications/Avast.app/Contents/Backend/hub/init.sh

Details: Exact match found in the whitelist - probably OK

Launchd: /Library/LaunchDaemons/com.malwarebytes.mbam.settings.daemon.plist

Executable: /Library/Application Support/Malwarebytes/MBAM/Engine.bundle/Contents/PlugIns/SettingsDaemon.app/Contents/MacOS/SettingsDaemon

AVAST reads your files, non-stop. when it is done, it starts again. MalwareBytes can be set to scan for trouble ONCE, and then be quiet.

Effective defenses against malware and ot… - Apple Community

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It sounds like the new battery health management feature in 10.15.5

There are some related discussions here https://discussions.apple.com/thread/251405858

Related article here https://support.apple.com/en-gb/HT211094

Your computer performs best when connected to AC power. It can use the full output of the Power Adapter AND when doing especially challenging work will also freely "borrow" power from the battery. In some cases, the charged state may even decline during stressful work.

When used only on battery, your computer has no extra cushion of power, and WILL perform more slowly. However, for ordinary non-stressful tasks this may not be objectionable (possibly not even noticeable.)

In general, you should ALWAYS connect AC power when it is possible to do so, and only run on batteries (which will be somewhat slower) when no AC sources are at hand. There are three micro-controllers cooperating on battery and charging issues, and your Mac will NEVER over-charge.

If you are just doing some surfing using Chrome, You should know that Chrome is a NOTORIOUS resource hog. ANY other modern Browser is likely to give faster results with fewer resources consumed.

Rusty5390 wrote:

it sounds like the new battery health management feature in 10.15.5

Not to me it doesn't.

The complaint was that while used on power adapter for what appears on the surface to be ordinary uses, the battery is discharging as if it were doing high-end work.

Battery Health Management mostly widens the 'charges-up to' window to reduce stress when re-charging. this complaint is not about re-charging.

CPU Usage Snapshot:

Type Overall

System: 9 %

User: 23 %

Idle: 68 %

Top Processes Snapshot by CPU:

Process (count) CPU (Source - Location)

Other processes 92.38 % (?)

trustd 27.83 % (Apple)

EtreCheck 5.38 % (App Store)

CoreServicesUIAgent 1.25 % (Apple)

iconservicesagent 0.17 % (Apple)

When the process using so much of your CPU cannot be identified by name, it is assumed to be kernel_task, as modified by kernel extensions. You have added these very invasive extensions:

Kernel Extensions:

/Applications/VMware Fusion.app

vmioplug.kext (VMware, Inc., 18.7.0)

vmnet.kext (VMware, Inc., 11.5.3)

vmmon.kext (VMware, Inc., 11.5.3)

/Library/Extensions

Soundflower.kext (Splashtop Inc., 1.6.7 - SDK 10.9)

intelhaxm.kext (Intel Corporation Apps, 7.3.2 - SDK 10.9)

LuLu.kext (Objective-See, LLC, 1.2.3 - SDK 10.14)

in particular VMWare Fusion is not negligible. It adds substantial overhead. if you are not using it, remove it for now.

You could try an SMC reset to get everything synchronized again:

How to reset the SMC of your Mac - Apple Support

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You could post the results of EtreCheck, a "discovery" Utility that looks around at resource use:

Using EtreCheck to Troubleshoot Potential… - Apple Community

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