If your device is running iOS 9 or below, you can try using a battery health checker app, however, don't try it if you're using iOS 10 or 11, Apple has removed most of the features that allow these apps to work. In the upcoming iOS 11.3 update, you will be able to check the health of your battery. For now, though, you can't really do that accurately.
Want to highlight a helpful answer? Upvote!
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
Newsroom Update
Apple is introducing a new Apple Watch Pride Edition Braided Solo Loop, matching watch face, and dynamic iOS and iPadOS wallpapers as a way to champion global movements to protect and advance equality for LGBTQ+ communities. Learn more >
Apple is introducing a new Apple Watch Pride Edition Braided Solo Loop, matching watch face, and dynamic iOS and iPadOS wallpapers as a way to champion global movements to protect and advance equality for LGBTQ+ communities. Learn more >
There is an app called "Battery Life" available in the App Store.
Other than that there's an application called coconutBattery for Macs that will tap into the battery stats including manufacturer, manufacture date, current input power, temperature, (accurate) remaining capacity, and accurate full capacity. Someone mentioned a similar application for Windows, but I don't recall the name.
How can I check battary health