iPhone 7 Battery Backup case
iPhone 7 Battery Backup case

To maintain your iPhone’s battery health effectively, it’s important to understand the basics. iPhone batteries, using advanced lithium-ion technology, are designed to charge rapidly, last longer, and provide significant power in a lightweight form​​. However, like all rechargeable batteries, they are consumable components with a finite lifespan. This lifespan is influenced not just by the time since the battery’s creation, but also by its “chemical age,” which considers factors like temperature history and charging patterns​​.

The Impact of Battery Aging

As iPhone batteries age chemically, their capacity to hold a charge diminishes, leading to shorter battery life and reduced performance​​. When an iPhone’s battery reaches a certain threshold of wear, it may not deliver enough power to support peak performance, leading to unexpected shutdowns. To counter this, iPhones with iOS 12.1 and later include a performance management feature that dynamically manages peak performance to prevent shutdowns​​.

Maximizing Battery Life and Lifespan

Adjusting Screen Brightness and Auto-Lock

Dimming your screen or activating Auto-Brightness can significantly extend battery life. Additionally, setting Auto-Lock to 30 seconds helps conserve power, as the screen turns off more quickly when not in use​​.

Managing Temperature

Exposure to extreme temperatures can adversely affect battery health. It’s recommended to keep your iPhone within 62° to 72° F (16° to 22° C). High temperatures above 95° F (35° C) can permanently damage the battery, while low temperatures below 32° F (0° C) can temporarily reduce performance​​.

Monitoring App Usage

Some apps consume more power than others. Regularly check which apps are draining your battery by going to Settings > Battery. This insight can help you manage app usage and close unnecessary apps running in the background​​.

Using Low Power Mode

Activating Low Power Mode temporarily reduces power consumption by disabling mail fetch, background app refresh, and other features until you can fully charge your phone​​.

Advanced Battery Management Features

Optimized Battery Charging

With iOS 13 and later, iPhones learn from your charging habits to reduce battery wear. The Optimized Battery Charging feature delays charging past 80% under certain conditions to extend the battery’s lifespan​​.

Performance Management

For older iPhone models, iOS dynamically manages performance to avoid unexpected shutdowns due to battery degradation. This management can affect how the device performs but is crucial for maintaining overall device reliability​​.

Dealing with Degraded Batteries

When your iPhone’s battery health deteriorates significantly, it may not deliver peak performance, leading to noticeable issues like longer app launch times and reduced frame rates​​​​. In such cases, consider replacing the battery to restore full performance and capacity.

When to Replace Your iPhone Battery

A normal iPhone battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles under normal conditions. The Battery Health feature in iOS helps you monitor the maximum capacity and performance capability of your battery, guiding you on whether it’s time for a replacement​​.


Extending the life of an older iPhone’s battery involves understanding how batteries age, optimizing settings, and using features like Low Power Mode and Optimized Battery Charging. Monitoring your battery’s health and replacing it when necessary can also play a crucial role in maintaining your device’s performance and longevity.


  1. How does temperature affect my iPhone’s battery? Extreme temperatures, both hot and cold, can significantly impact your iPhone’s battery health and performance. It’s best to keep the device within 62° to 72° F (16° to 22° C)​​.
  2. What is Optimized Battery Charging and how does it work? Optimized Battery Charging, available on iOS 13 and later, learns your charging routine to minimize battery wear by delaying charging past 80% in certain situations​​.
  3. How can I check which apps are draining my battery? Go to Settings > Battery to see a detailed breakdown of which apps are consuming the most power​​.
  4. When should I consider replacing my iPhone’s battery? Consider battery replacement when it retains less than 80% of its original capacity or if you experience significant performance issues​​.
  5. Does iOS manage performance for older iPhone models? Yes, iOS dynamically manages performance for older iPhone models to prevent unexpected shutdowns due to battery degradation​​.
Eric Chan

Hi! I’m Eric and I work on the knowledge base at GadgetMates.com.  You can see some of my writings about technology, cellphone repair, and computer repair here.

When I’m not writing about tech I’m playing with my dog or hanging out with my girlfriend.

Shoot me a message at ericchan@gadgetmates.com if you want to see a topic discussed or have a correction on something I’ve written.

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