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How to Check iPhone Battery Health Before Buying Used

8/19/2026
How to Check iPhone Battery Health Before Buying Used

When considering a used iPhone, understanding its battery condition is essential. As a consumable component, battery performance declines over time. Fortunately, Apple provides built-in tools to monitor both battery health and cycle count, allowing users to evaluate whether the device is still viable or if a battery replacement is necessary.

Why Battery Health Matters

Knowledge of battery metrics helps potential buyers ascertain whether the battery performs as expected and when it might need replacement. This understanding is vital before committing to a second-hand iPhone purchase. Accessing this information is straightforward through the device's settings without the need for additional apps.

How to Check Battery Health on iPhone

Checking the battery health of an iPhone is a simple process. Start by navigating to the Settings app, then choose Battery, and look for the Battery Health option. For older models, this section may be labeled Battery Health & Charging.

Here, users will find an estimate of the battery's capacity compared to its condition when new, along with other useful information. The Maximum Capacity percentage is the key indicator of the overall battery condition.

Understanding Cycle Count

According to Apple, a battery is designed to retain up to 80% of its capacity under normal conditions. For newer models like the iPhone 15, this estimate is based on 1,000 full charge cycles, while older models are expected to last around 500 cycles before experiencing significant degradation.

When the battery health falls below 80%, the iPhone may still operate, but users will likely notice a marked decline in battery life. In some instances, iOS activates additional performance management features to prevent sudden shutdowns from a depleted battery.

Using Third-Party Apps for Older iPhones

For users with older iPhone models, Apple does not provide native cycle count statistics. Instead, they can rely on third-party applications like coconutBattery, which is popular on Mac, to check battery cycle count. Understanding this information is crucial for assessing the longevity of the device and the extent of its usage.

To check the cycle count on the iPhone 15 or newer, go to Battery, then Battery Health, and scroll down to find the cycle count. Remember that one cycle equals using 100% of the battery capacity, even if it’s not used all at once. For instance, using 50% of the battery, charging it back up, and using another 50% counts as one complete cycle.

Tips for Maintaining Battery Health

Reaching the maximum cycle count doesn't mean the battery will fail immediately, but it often results in reduced capacity, leading to shorter battery life. If the battery health drops below 80% or reaches 1,000 cycles, users should consider a battery replacement to maintain optimal device performance.

To preserve battery health, users can enable the Optimized Battery Charging feature in the settings. This option learns daily routines and charging habits, delaying the charge to 80% and completing it just before the device is needed again. Additionally, iPhone 15 and newer models allow users to set a maximum charge limit, further extending battery health.

For battery replacement, contacting Apple Support is recommended to schedule an appointment.

In conclusion, understanding how to check battery health and cycle count empowers users to make informed decisions when purchasing a used iPhone and helps maintain the longevity of their current devices.

Source: https://telset.id/how-to/cara-cek-battery-health-dan-cycle-count-iphone-sebelum-beli-bekas

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