iPhone battery health refers to the overall health and performance of the battery in your iPhone. Over time, the battery's capacity to hold a charge can drop, leading to shorter battery life and potentially unanticipated shutdowns. To help druggies cover their battery health, Apple introduced a Battery Health point in iOS11.3 and latterly.
The Battery Health point displays information about the maximum capacity of the battery compared to its original capacity when it was new. It also provides information about the battery's peak performance capability, which is the capability of the battery to deliver maximum power.
To check your iPhone's battery health, go to Settings> Battery> Battery Health. Then, you can see your battery's maximum capacity and peak performance capability. However, it may be time to replace the battery, If your battery's maximum capacity has degraded significantly.
It's important to note that there are several factors that can affect the health and lifetime of your iPhone battery, including operation patterns, environmental factors, and charging habits. To help extend your battery's lifetime, it's recommended to avoid extreme temperatures, uses original or Apple-certified dishes, and avoid constantly charging your phone to 100.