Battery optimization is a feature available on Android and iOS devices that helps to conserve battery power by preventing apps from accessing networks, syncing, etc. when not in use or not needed. This feature is designed to extend battery life by reducing the amount of power consumed by apps running in the background.

On Android devices, battery optimization can be managed through the settings menu. Adaptive Battery is a feature that learns from your phone usage to continuously optimize how apps use battery. To extend battery life, it may reduce performance and delay app notifications. When your battery is very low, Adaptive Battery may reduce your phones performance and background app activity. Battery optimization can also be turned on or off for individual apps. If battery optimization is turned off for an app, that app can run more while youre not using it, even when Adaptive Battery is on. This can use more battery than needed.

On iOS devices, Optimized Battery Charging is a feature that reduces the wear on your battery and improves its lifespan by reducing the time your iPhone spends fully charged. When the feature is enabled, your iPhone will delay charging past 80% in certain situations. Your iPhone uses on-device machine learning to learn your daily charging routine so that Optimized Battery Charging activates only when your iPhone predicts it will be connected to a charger for an extended period of time.

In summary, battery optimization is a feature that helps to conserve battery power by preventing apps from accessing networks, syncing, etc. when not in use or not needed. It is available on both Android and iOS devices and can be managed through the settings menu.