For Apple phones, it is a function to check the health value of the battery in the settings. If we just bought an Apple mobile phone, the movement of battery health value is 100%, but with the passage of time, the frequent increase of mobile phone usage will lead to the decline of battery health value, so I will share with you some things that need attention in use.
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At present, the batteries of smart phones are basically lithium-ion batteries, and there is no memory charging, so we don't need to run out of electricity in the batteries before charging. The best way is not to let the mobile phone charge less than 40%, or try to charge the mobile phone when it is less than 40%.
This is a very important explanation. Many friends always like to play with their mobile phones while charging. In fact, this will cause great loss to the battery of the mobile phone, especially the battery like lithium ion. If you play while charging, it may cause the battery health value to drop for a short time.