1, the battery is completely dead and can't be used, because Apple's mobile phone is a lithium battery. If the battery charge is often less than 20%, or it is exhausted before charging, the chemical activity inside the lithium battery will be destroyed, leading to the aging of the battery life.
2, can't sleep at night, charging the phone all night will hurt the battery life. Because the lithium battery is continuously charged at full charge and high voltage for a long time 100%, it will lead to faster battery aging.
You can unplug the mobile phone when it is fully charged. If the phone is fully charged, the battery will be in a high voltage state.
4. Always keep the battery power of the mobile phone between 65 and 80, and the battery life will be longer.
This method is suitable for most models of mobile phones of Apple brand.
So you can charge your Apple mobile phone anytime and anywhere, and the battery can only be charged when it is dead. In addition, don't care too much about the health of the battery, because the battery is a consumable and will age over time.