How to check your iPhone's battery health and cycle count

You'll be glad to know if you're buying used. Filipe Espósito for Engadget When you buy a new iPhone, you expect it to last. However, all rechargeable batteries are consumable components that chemically degrade over time. As a battery degrades, it can hold less charge, which ultimately affects your device's daily use. Apple provides built-in tools that help you monitor cycle count — the number of full discharges and recharges it has undergone — and overall battery health. Understanding these metrics is essential for knowing if the batter is working as expected, when it might be time for a replacement or for better understanding the condition of a used iPhone before you buy it. Checking your iPhone's battery health is a pretty simple process. To get started, open the Settings app on your iP