Similar to all rechargeable batteries, mobile phone batteries are consumable parts, and the longer they are used, the lower their energy efficiency. (that is, we often say that the battery capacity has become smaller)
After nearly a year's use, the capacity of the mobile phone has dropped by 2% instead of suddenly, which is a normal loss.
Extended data:
In the battery settings of iPhone, there is a "battery health" to check; An official statement: Mobile phone batteries are similar to all rechargeable batteries and belong to consumable parts. The longer it is used, the lower the energy efficiency. At the same time, the percentage of the maximum capacity of the mobile phone battery is displayed to indicate the remaining life of the battery.
Usually, the percentage of maximum capacity seen by users is higher than 80%, which can be used normally; If it is less than 80%, it means that the mobile phone battery has been seriously damaged, and the life of the mobile phone battery will be significantly reduced.
If it is the national bank version, and the mobile phone is within the one-year warranty period; As long as the maximum capacity percentage of mobile phone battery is less than 80%, you can go to Apple for free after-sales maintenance; Because less than 80% in such a short time is usually a battery failure. Of course, this kind of free maintenance is limited to the version of the Bank of China, and other versions of the models do not enjoy the warranty policy in China.
If the maximum capacity of the iPhone battery is below 80%, as long as it can discharge normally, it can continue to be used without affecting the use. If it affects the user experience, you can pay for the replacement after the official release of Apple. Other professional repair shops also have the service of replacing batteries, but you must choose an official or reliable repair shop.
If you don't plan to replace the battery, in fact, Apple officials and some third parties have also provided some practical solutions for consumers. For example, iPhone 8 and the above models support 18W fast charging, and we can try to choose fast charging head when charging; Then the clip-on battery is also a good choice. Although it will make the mobile phone heavier, its endurance will be significantly improved.
Generally speaking, if the battery capacity is less than 80%, you can make a more suitable choice by referring to the above three schemes, either replacing a battery or continuing to use it.