Apple battery health display maintenance means that the mobile phone battery is obviously aging or damaged, so it is recommended to replace the battery.
Try not to play with your mobile phone when charging at ordinary times, which is very harmful to the battery of your mobile phone. Secondly, don't charge it below 20%, and don't charge it to 100% when charging. For a lithium battery, you can charge and pull it out at the same time, without worrying about the memory effect of the battery. At the same time, you need to use the original charger, so as to better protect the battery.