Please make an appointment to go to the Apple Store, or to any authorized service location of Apple, and will try to repair the iPhone during the user's visit. If you make an appointment to communicate with Genius Genius, please be sure to bring a photo ID card issued by the government.
If the situation is complicated, you may need to send the iPhone to an Apple repair center. In this case, it takes about a week to get the iPhone back. If any damage (such as broken screen) affects battery replacement, the related problems must be solved before battery replacement. In some cases, maintenance costs may be incurred.
Matters needing attention in using mobile phone battery
The temperature of the battery in use is the main reason that affects the health of the battery. At high temperature, the diffusion of hydrogen ions and sulfate ions in lithium-ion polymer batteries will accelerate, so the discharge capacity of the batteries will increase.
The reaction of the battery is hydrogenation reduction reaction. If there is charge, there will be discharge, but don't overdischarge the battery. Therefore, you'd better charge your mobile phone when it keeps a certain amount of power, and don't often charge it when the power is exhausted, which will affect the reactants inside the battery.