iOS 17.4 update makes it easier to check your iPhone battery’s cycle count, manufacturing and first use dates

New iOS 17.4 battery information page

After the iOS 17.4 update, the iOS Battery Health page on the iPhone 15 series shows the following:

• Cycle Count: It tells you the number of times you have used your iPhone fully to 100%. We said "used" and not "charged" since one count includes both charging and discharging. So, if you charge the device from 0 to 75%, the time you charge the remaining 25%, only then the iPhone considers it as full 100% charging. Now, similarly, if you use 35% of the capacity, the time the iPhone finds you have used the remaining 65% juice, it considers the full discharge has taken place. Together, that means one full cycle count. You can refer to Apple's explanation here.
• Manufacture Date: It shows the date when the iPhone battery was made.
• First Use: It tells when the iPhone battery or the iPhone was first used. 

Lithium-ion batteries don't diminish by a noticeable percentage but do degrade if you don't use them. So, if you find the iPhone battery was manufactured way before when it was first used, you know it could have lost capacity while it was sitting idle. 

How to check battery cycle count, manufacture and first use dates on iOS

On the iPhone 15 series with iOS 17.4 or later, follow these steps:

Step 1: Go to iOS Settings

Step 2: Tap on Battery

Step 3: Tap on Battery Health and therein you will find these details.

Else, these details were previously present in the About section of the iOS. Also, if it stays limited to the iPhone 15 series, then too, you can check the cycle count this way:

Step 1: Open iOS Settings 

Step 2: Tap on General and then About

Step 3: Scroll to the bottom and therein under the Battery section, you will find these 3 stats.