https://wccftech.com/macos-monterey-is-bringing-low-power-mode-to-the-mac/

You probably asked for it and Apple has delivered. macOS Monterey is bringing Low Power Mode to the Mac. Here's how it works.

iPhone users have the luxury to kick their device into Low Power Mode in order to save battery life and get through the day without hunting down a charger. The way the feature works is quite genius too - turn off activities like automatic background app refresh, less frequent cloud updates and more.