Not normal. According to Apple's official statement, under normal circumstances, Apple's 1 1 battery can last 800 charging cycles, that is, under normal use, the battery life can reach about 2 years.
Generally speaking, this situation is rare. You can check the battery health through our education first. Under normal use, the battery health of iPhone is above 85% within one year and above 75% within two years.
Normal, the frequency of use decreased from 100% to 88% in one year and three months. It is estimated that it will drop from 100% to 80%. If it is used more, it will take about one and a half years, and if it is used less, it will take about two years. 88% can still be used for a while, and less than 80% batteries are not durable.