When the battery capacity is less than 80% of the original specification, battery maintenance service can be obtained. The AppleCare+ service plan provides maintenance or replacement services by authorized Apple technicians, including parts and labor services.
Mobile phone lithium battery has long service life. If it doesn't fall below 80% within one year, the battery life will be reduced and the general capacity will reach about 80% after charging the iPhone for more than 500 times, about 14~ 18 months. At this time, you can consider changing the battery.
Matters needing attention in mobile phone charging
Inappropriate charging temperature: In low temperature environment, the low temperature protection mechanism of lithium battery will make the substances in the battery not react chemically, unable to charge or slow down the charging speed. Lithium batteries can also work well in a warmer environment, but it should be noted that overheated environment will also lead to the scrapping of lithium batteries.
If the mobile phone battery is detachable, don't forcibly apply pressure when installing the battery, otherwise the battery will leak, overheat, burst and catch fire. If the cell phone battery is non-detachable, please don't disassemble it yourself, so as not to cause equipment damage and safety problems.