iPhone 15s show the number of battery cycles. iPhone 15 users can easily determine the number of battery cycles from a screen that shows this information.
With USB-C it is easy to migrate data from one iPhone to another with a cable
Ray Wong X (ex Twitter) reports this by showing an iPhone 15 screen with the details in question. With older iPhone models, you can use third-party apps (e.g. Coconut Battery for Mac) and keep details such as battery build date, number of cycles, temperature, status, age and more, using the Lightning/USB cable and allowing your computer to access information on your phone.
When you use a laptop, iPad or phone, the battery goes through charging cycles. A charging cycle occurs when you use all the battery power, but this is not necessarily a single charge.
Batteries have a limited number of charging cycles before their performance decreases. When a battery has exhausted its cycles, it is advisable to replace it to ensure optimal performance. The battery can be used even after it has reached its maximum number of cycles, but this may result in a reduction in battery life.
By knowing the number of battery charge cycles and how many are left, you can determine when the battery needs to be replaced.
Apple explains that it is possible to recharge the lithium ion batteries it produces without waiting for them to completely discharge. Batteries of this type actually work in charging cycles: you complete a cycle every time you consume 100% of the battery’s capacity, but this 100% does not necessarily derive from a single charge. “Suppose for example that you have used 75% of the battery during the day, and that you have fully recharged it in the evening; if the next day you use 25% of it, you will have used 100% of the battery: that is to say that in the two days you have only used one charging cycle,” explains Apple. And again: “It could take several days to complete a cycle. After a certain number of recharges the capacity decreases, regardless of the type of battery.”
For lithium-ion batteries, capacity decreases slightly at the end of each charge cycle. Apple says its batteries are designed to retain at least 80% of their original capacity over many charge cycles – the maximum number depends on the product.
