How to Fix iPhone 11 Battery Health Dropping Fast?

There could be several reasons why your iPhone 11 battery health is dropping fast. It could be due to excessive usage, background app refresh, outdated software, or even a faulty battery. To fix it, try optimizing your settings, updating your software, or contacting Apple support for further assistance.

The iPhone 11, released in September 2019, has been hailed for its impressive features, sleek design, and powerful performance. One of the vital components that fuel this performance is the device’s battery. However, some users have raised concerns about their iPhone 11’s battery health dropping faster than expected.

Battery health is a measure of how well your battery performs compared to when it was new. A lower battery health indicates reduced performance and can be cause for concern, especially if it drops rapidly. This article explores the reasons behind rapid battery health depreciation and provides practical solutions to address the issue of why this is happening.

What is Battery Health and Why is it Important?

Battery health is the absolute best way to ensure the longevity of your iPhone’s battery. It is the current condition of a battery compared to its optimum, out-of-the-box state. Apple includes a “Battery Health” feature in the settings of its devices to inform users of their battery’s current state. A brand-new iPhone should have 100% battery health, which means it can deliver peak performance. My iPhone 11 battery health dropped to 95 from 96 in just 3 days, and it’s only been 4 months since I bought it. To maintain battery health and ensure its longevity, the absolute best way is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night.

This feature allows the battery to “rest” during the nighttime pause, using mains power instead of battery power, thus reducing the need to charge the battery quite as often and optimizing its long-term use. For example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight, that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use.

Over time, all rechargeable batteries degrade due to chemical aging, and their ability to hold a charge decreases. When the battery health drops, your device may experience reduced performance, and in extreme cases, the device may turn off unexpectedly.

Common Causes for Fast Battery Health Drop

1. Charge Cycles

A charge cycle counts when you use and recharge 100% of your iPhone models’ battery capacity, but not necessarily all at once. For example, using 50% one day, then recharging it to 100%, and using 50% the next day would count as one charge cycle. Batteries are built to last a certain number of full charge cycles, typically around 500 for iPhones. After this, the health of the battery starts to decline faster. As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged. This can be referred to as the battery’s maximum capacity — the measure of battery capacity relative to when it was new. In addition, a battery’s ability to deliver maximum instantaneous performance, or “peak power,” may decrease. In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery. One attribute that affects this instantaneous power delivery is the battery’s impedance.

A battery’s lifespan is related to its “chemical age,” which is more than just the passage of time. It includes different factors, such as the number of charge cycles and how it was cared for. For example, keeping an iPhone half-charged when it’s stored for the long term is one way to maximize battery performance. All rechargeable batteries, including iPhone batteries, are consumables and have a limited lifespan — eventually their capacity and performance decline such that they need to be replaced.

2. Extreme Temperatures

Both hot and cold environmental conditions affect battery performance. Excessive heat can cause the battery to degrade more quickly, while cold conditions can temporarily reduce battery efficiency.

3. Software Issues

Sometimes, software updates or certain apps can also take a toll on your battery health. Malware or poorly optimized apps can also cause your battery to drain quickly.

4. Overcharging

Leaving your iPhone plugged in for an extended period, even after it reaches 100%, can generate excess heat, which contributes to faster battery degradation.

Practical Solutions for Battery Health Dropping

1. Optimal Charging Practices

The first and most straightforward step to preserving your iPhone 11’s battery health is to adopt optimal charging practices. Avoid letting your phone’s battery drop to 0% before recharging. It’s best to keep your battery level between 20% to 80%.

2. Temperature Control

Try to keep your iPhone 11 in a moderate-temperature environment. Avoid leaving your phone in hot cars or in direct sunlight for extended periods. Similarly, don’t use your phone in extremely cold conditions.

3. Software Update

Ensure that your iPhone 11 is running the latest version of iOS. Software updates often contain bug fixes and improvements that can enhance battery performance. You can update your device by going to Settings > General > Software Update.

4. Check Battery Usage

Go to Settings > Battery to view your battery usage information. This feature shows which apps are consuming the most power. If an app is draining your battery unexpectedly, consider updating the app, or if necessary, uninstalling it.

5. Reset All Settings

If you’ve tried the above steps and still experience a fast decline in battery health, a last resort option is to reset all settings on your iPhone, including the screen brightness settings and enabling auto-brightness, to avoid battery drain. Note that this will revert all settings to their default values, but it can resolve underlying software issues. To do this, go to Settings > General > Reset > Reset All Settings. Another option to adjust the brightness of the screen manually is by opening the Control Center and dragging the Sun Icon.

6. Battery Replacement

If your iPhone 11’s battery health drops below 80%, it’s generally advised to get a battery replacement, especially if the device is out of warranty. Apple provides battery replacement services that guarantee quality and performance.


Battery health is a crucial factor in the overall performance and longevity of your iPhone 11. While some degree of battery health decline is unavoidable, following the above strategies can help mitigate rapid drops. If you’ve exhausted all these options and still experience rapid battery health degradation, it may be time to consult Apple Support or consider a battery replacement.

Frequently Asked Questions

Q: What is considered a ‘normal’ drop in battery health?

A: Battery health can decline over time due to a variety of factors such as charge cycles, temperature, and usage. A drop of a few percentage points over several months is generally considered normal. However, if you see a rapid drop of more than 10-15% within a few weeks, it may be a cause for concern and warrant further investigation.

Q: Can software updates affect my iPhone 11 battery health?

A: Yes, software updates can both positively and negatively affect battery health. Sometimes, updates include optimizations that extend battery life and improve health. However, in some instances, updates might contain bugs that can adversely affect battery performance. Always keep your iPhone updated to the latest version of iOS for optimal performance, but monitor your battery health closely after each update.

Q: How do I check my iPhone 11 battery health?

A: You can check your iPhone 11’s battery health by going to Settings > Battery > Battery Health. Here you will find information such as your Maximum Capacity and Peak Performance Capability.

Q: What does it mean when my iPhone says “Service” next to Battery Health?

A: When the Battery Health section in settings displays “Service,” it indicates that your iPhone battery may have a more serious degradation issue that can’t be resolved through typical troubleshooting steps. In such cases, it’s best to consult Apple Support or an authorized service provider for a possible battery replacement.

Q: Is it bad to charge my iPhone 11 overnight?

A: Modern iPhones, including the iPhone 11, are designed to prevent overcharging by stopping the charge once the battery reaches 100%. However, keeping the phone plugged in for extended periods can generate heat, which may contribute to faster battery degradation over time. As a precaution, it’s good practice to unplug your phone once it’s fully charged.

Q: How do I know if an app is draining my battery?

A: You can identify apps that are draining your battery by going to Settings > Battery. This section provides a breakdown of battery usage by app. If you find an app using a disproportionately high amount of battery, consider updating, optimizing its settings, or uninstalling it.

Q: Will Resetting All Settings delete my data?

A: No, Resetting All Settings will not delete your data, apps, or personal information. It will only reset system settings back to their defaults. However, it’s always a good idea to back up your device before taking any major actions.

Q: How much does it cost to replace the battery in an iPhone 11?

A: As of my last update in September 2021, an out-of-warranty battery replacement for the iPhone 11 cost $69 through Apple. Prices may vary depending on your location and the service provider. Always consult the latest information from Apple or an authorized service provider for the most current pricing.

Q: Should I always keep my iPhone in Low Power Mode to save battery?

A: Low Power Mode reduces overall performance and limits some functionalities to extend battery life. While it’s useful in situations where you need to conserve battery, keeping your phone in Low Power Mode all the time may not be necessary and could affect your user experience.

Q: Can third-party chargers affect my iPhone 11’s battery health?

A: Using non-Apple, non-certified chargers can potentially harm your iPhone’s battery. Low-quality chargers may not have the necessary voltage regulation and could deliver inconsistent power, leading to faster battery degradation.

By addressing these frequently asked questions, you’ll have a more comprehensive understanding of how to manage and maintain your iPhone 11’s battery health effectively.

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