As long as the cell phone battery loss efficiency is within this range, it is normal. Moreover, if the manual label is still under warranty, the battery efficiency will be lower than 80%, and Apple can replace the battery for free after sale. In normal use, without serious impact, the service life of the mobile phone apple should be 5 years, which may affect the service life of the mobile phone apple in wet and rainy areas. It is normal that the health of any mobile phone battery, including Apple's, will decline.
IPhone batteries use lithium-ion technology. Compared with previous generations of battery technology, lithium-ion battery has faster charging speed, longer service life, higher power density and longer battery life in a lighter volume. For your equipment, rechargeable lithium-ion battery technology is the best technology at present.
Maintenance of mobile phone battery
First, reduce the number of uses.
Most smart phones use lithium batteries, and the service life of lithium batteries is calculated by the number of times. Reducing the frequency of using mobile phones can avoid power consumption of mobile phones. This method can reduce the consumption of battery life to a certain extent, but after all, the mobile phone is bought and used. What we can do is to minimize the frequency of use and delay the consumption of battery life without affecting normal use.
Second, avoid being in a "charging and discharging state" at the same time.
The most harmful way to use mobile phone battery is to be in "charge and discharge state" at the same time, and the most common way is to charge while playing mobile phone. In this state, the battery will supply power to the mobile phone and be charged by the charging device. At this time, the temperature of the battery will also rise, which will also accelerate the consumption of battery life. This situation should be avoided if you want to delay the consumption of battery life.