I am impressed that you managed to lose only 3% since it was released last year. That is far above average for a device that is in use every single day since purchase.
Lithium Ion batteries are rechargeable by design.
As part of that design are the electrolytes that hold a charge.
There are allot of steps and various machines that are used to construct a battery.
Between those assembly steps, the batteries are carefully inspected along the way, often in devices used to magnify the various components several times during the production process.
There are various tests to ensure that there are no leaks.
I used to assemble Li Ion batteries.
I can assure you that the failure rate is extremely low.
What you have experienced is normal and expected.
All rechargeable batteries are consumable components that become less effective as they chemically age.
Recent software updates can accelerate that process by adding features that consume more power.
As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged.
Li Ion (Lithium Ion) batteries have recharging capabilities; however there are limits.
Temperature Effects on Li Ion Battery Life:
Capacity loss in standby applications is largely determined by temperature
Annual capacity loss tends to decline as the battery ages
80% remaining capacity is generally not the end of a lithium battery's useful life, but recommended byApple for replacement
Irecommend to slow charge your iPhone to maximize the charge capacity, battery health and efficiency. ⚡️🔋
NOTE:Temperature: Charge above -30°C and Discharge below 55°C.
Apple won’t replace the battery until it reaches 80% capacity.
The measure of battery health deterioration/drainage is subjective and can vary depending on individual usage patterns. There is no universal standard to determine whether the battery health deterioration/drainage is normal or abnormal because it heavily relies on how the battery is used and maintained.
Protect & Prolong the Life of your iPhone's Battery:
Try to monitor Battery usage by iPhone Activity as shown below
What is shown under battery usage? Checking that would give you an indication of the usage behavior.
Background Activity
Notifications
Connected to Charger
Or any Other
Try some of these options too.
To prolong the life of your iPhone battery, you can follow these tips and best practices:
To prolong the life of your iPhone battery, you can follow these tips and best practices:
Optimize Battery Charging:Enable the "Optimized Battery Charging" feature on your iPhone. It helps reduce the wear on the battery by slowing down the battery aging process. You can find this option in Settings > Battery > Battery Health. About Optimized Battery Charging on your iPhone - Apple Support (IN)
Avoid Extreme Temperatures:Extreme temperatures, both hot and cold, can negatively impact your battery life. Avoid exposing your iPhone to excessive heat or cold, such as leaving it in direct sunlight or in a freezing car.If your iPhone or iPad gets too hot or too cold – Apple Support (UK)
Avoid Draining the Battery to Zero: Charge it whenever the charge becomes lower than 20%. The rest is up to you when to charge. how long to charge, how often to charge, which adapter to use starting from 5W to 140W USB-C Power Adapter etc.
Minimize Background App Refresh: Limit the number of apps allowed to refresh in the background. Go to Settings > General > Background App Refresh and disable it for apps that don't require real-time updates. Switch apps on your iPhone, iPad, or iPod touch - Apple Support (IN)
