The app does not notify you about battery-draining apps on devices with Android 7 and 8.
Kaspersky Battery Life sends you notifications when it detects battery-draining activity on your device. There are the following notifications:
Too many apps are running. You will get a notification when more than 20 apps are running simultaneously. If you tap the notification, you will be taken to the Battery life app window where you may stop one or more running apps, except your favorite apps.
Apps are draining your battery. You will get a notification when an app you have not added to Favorite apps is consuming too much battery. If you tap the notification, you will be taken to the Details window where you may stop this app or add it to Favorite apps.
Favorite apps are draining your battery. You will get a notification when a favorite app is consuming too much battery. If you tap the notification, you will be taken to the Details window where you may stop this app or remove it from Favorite apps.