Apple's mobile phone is turned off What does it mean to charge it and display the lightning icon?

If the phone is turned off automatically, the phone will display this message.

There is no lightning sign when the mobile phone is turned off and charged. The screen shows a lightning sign, which is a sign that it needs to be charged, but it is not in the charging state. When the phone is charging, the lightning sign will not appear. If there is a lightning sign, please unplug it and plug it in again. The mobile phone automatically turns off, and when it is charged to a certain amount of power, it will automatically turn on.

Apple's mobile phone should try not to automatically turn off and recharge. Leaving the mobile phone in a low battery or even turned off for a long time will only damage the mobile phone and make the battery lose its normal working ability in a short time. Due to the characteristics of the lithium battery itself, when the battery is dead, the mobile phone will still have a small amount of power storage, and the power of the lithium battery will be automatically consumed as time goes by. After this small amount of power is exhausted, the battery will automatically enter a deep discharge state, and the battery activity will also decrease, which will lead to the inability to charge the mobile phone over time.

Therefore, when we use the mobile phone in our daily life, we should try to avoid recharging the mobile phone battery after it is dead, recharge it at any time, and stop charging at any time without any scruples. This is the biggest advantage of lithium batteries. Facing up to this advantage and giving full play to it is the correct method of battery maintenance.