Is it normal for Apple's mobile phone to drop to 90 in half a year?

Apple's mobile phone dropped to 90 in six months. Apple's mobile phone battery has been used for half a year, and the remaining health is normal between 85% and 99%. If it is normal at 95%, it is 100% or less than 80%, it is abnormal. If the health drops to 80% within one year, you can replace the new battery for free. Apple mobile phone refers to the iPhone series of smart phones produced by Apple. Since its first release on June 9, 2007, iPhone has become one of the most popular consumer electronic products in the world. The core features of iPhone include its innovative touch screen technology, simple design language and iOS mobile operating system developed by Apple. This series of mobile phone products has won a good reputation for its high-performance hardware, smooth user experience and rich application ecology.