What does ipad think of battery loss?

Mobile phone batteries are consumables, and frequent use of mobile phones will gradually reduce the health of batteries.

How to check the battery health of Apple mobile phone: Go to Settings-Battery-Battery Health (Beta) and check the battery health at the maximum capacity. Note: If the battery is less than 80% healthy, it is recommended that you contact the local Apple Store or a third party to authorize the replacement of the battery after sale.