1. In daily use, it is best not to use automatic shutdown for Apple phones, but to charge the phone when it reaches 20% -40% of its battery level, which can be fully charged and unplugged.

　　2. Early mobile phones used nickel cadmium and nickel hydrogen batteries, which required similar 'activation'.

　　These batteries will produce a "memory effect", which can cause overcharging when charged in an incomplete discharge state. Over time, users may feel that the battery is quickly depleted, so they need to be fully charged for 12 hours the first time, and it is best to recharge when it runs out of battery.

　　3. The battery used on iPhone phones is a lithium-ion battery. Its initialization process has been completed during manufacturing, so activation is not required when starting use. Lithium batteries also have no memory effect and can be charged at any time. If the phone uses automatic shutdown, the internal voltage of the lithium battery may be too low due to excessive discharge, which may result in inability to turn on and charge. Therefore, lithium battery charging emphasizes "eating less and eating more", and frequent shallow charging and discharging is more helpful in extending its lifespan.

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