If you want to choose a good battery, first of all, don't trust any original battery. Generally, after Apple's mobile phone battery has problems, many consumers go directly to the repair shop to replace it. In fact, the battery that the repair shop changed for you at this time is not original. It just sells you some brand-name batteries under the slogan of original batteries. In that case, you will change it with him in the future. Even if it looks original, it may have been disassembled by some second-hand Apple phones. So when replacing the battery of Apple mobile phone, don't trust any official original battery.
If you want to choose a good battery, you can buy a new battery directly from some platforms. In fact, there are many famous batteries, and the quality can be guaranteed, such as Scud and Pinsheng. These are relatively niche battery brands, but the quality is also very good. There is no need to choose original batteries. Other brands of batteries can be used as long as the quality is excellent.
In the process of installing the battery, the purchased battery usually comes with an installation video, just follow the search process to install it.