Why is the ipad air2 update 1 1.3 not as healthy as the battery?

Ipad air2 update 1 1.3 battery health. In the battery capacity function, the search method is as follows:

The first step is to click Settings on the iPad desktop. As shown in the figure below:

Step 2, then find the battery option and click it. As shown in the figure below:

Step 3, then find the battery health and click on it. As shown in the figure below:

Step 4: In this interface, you can check the battery consumption of the iPad. As shown in the figure below: