What is the use of apple battery health?

Users can check the life of the battery at any time in order to replace the battery. Under normal circumstances, the health of Apple battery is an indication of the battery status and remaining capacity of iPhone. Its function is to allow users to check the battery life at any time in order to replace the battery. If it is less than 80%, it means that the battery is aging, which will eventually lead to faster power consumption, and it needs to be recharged about 2-3 times a day.