Do iPhones Have Batteries and How to Maintain Them

iPhones do have batteries, and they're designed to be as efficient as possible. The battery is typically located at the bottom of the phone.

The standard iPhone battery is a lithium-ion battery, which is a type of rechargeable battery. This type of battery is known for its high energy density and long lifespan.

To maintain your iPhone's battery, it's essential to keep it away from extreme temperatures. This means avoiding leaving your phone in a hot car or in freezing temperatures.

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iPhones have lithium-ion batteries, which are rechargeable and have become the standard in mobile devices due to their superior performance.

These batteries work by moving lithium ions between electrodes during charging and discharging, making them lighter, faster, and longer-lasting than older battery types.

Battery capacity varies by iPhone model, ranging from 2,000 mAh to 4,500 mAh, with the iPhone 12 mini having a 2,227 mAh battery and the iPhone 16 Pro Max packing in 4,685 mAh.

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Apple designs its iPhone batteries to retain up to 80% of their original capacity after 500 complete charge cycles under normal conditions, with a charge cycle counted when you've used (discharged) an amount that equals 100% of your battery's capacity.

You can check your battery's health and cycle count right in iOS under Settings > Battery > Battery Health.

Batteries of iPhone 14 models and earlier are designed to retain 80 percent of their original capacity at 500 complete charge cycles under ideal conditions, while iPhone 15 models are designed to retain 80 percent of their original capacity at 1000 complete charge cycles under ideal conditions.

As your battery health degrades, so can its ability to deliver peak performance, with the Battery Health screen including a section for Peak Performance Capability where messages might appear.

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iPhones run on rechargeable lithium-ion batteries that charge fast and pack more power into a lighter battery than ever before.

Batteries of older iPhones are more prone to battery issues than newer models, which are built with advanced features that compensate for poor battery health.

Lithium-ion batteries store a lot of energy relative to their size and weight, making them crucial for devices like iPhones that need to stay slim and lightweight.

Batteries of iPhone 14 models and earlier are designed to retain 80 percent of their original capacity at 500 complete charge cycles under ideal conditions.

As your battery health degrades, so can its ability to deliver peak performance, which can lead to an iPhone giving up early in the day.

The Battery Health screen includes information on maximum battery capacity and peak performance capability, and you can check it by going to Settings > Battery and tapping Battery Health.

If your iPhone's battery health is declining, a battery replacement can keep it lasting longer, and you can schedule a fast battery fix with Apple's experts.

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To keep your iPhone's battery in top shape, it's essential to understand how to manage it effectively. You can check your battery health by going to Settings > Battery and tapping Battery Health. Here, you'll find information on maximum capacity, performance capability, and important battery messages.

To prevent unexpected shutdowns, it's crucial to keep your battery charged, especially in colder temperatures. If your battery has a low state of charge or a higher chemical age, you might experience shutdowns more frequently. iOS dynamically manages performance peaks to prevent shutdowns on iPhone 6 and later models, but this might impact device performance.

To maximize overall system performance, iPhone 8 and later use advanced hardware and software design that provides a more accurate estimation of power needs and battery capability. This allows iOS to anticipate and avoid shutdowns more precisely, making the effects of performance management less noticeable.

For most iPhone models, it's recommended to keep your battery between 20% and 80% most of the time to reduce long-term wear. However, occasional charging to 100% won't harm your battery, thanks to iOS features designed to protect it.

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Here are some signs that your iPhone might be experiencing performance management changes:

Enabling Low Power Mode is a simple way to stretch out your iPhone's battery life. This feature reduces or disables background app refresh, visual effects, and automatic downloads to save battery power.

By flipping on Low Power Mode, you can quickly extend your charge without drastically impacting usability. It's especially useful when your battery is running low.

To access Low Power Mode, go to Settings > Battery or use the Control Center.

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Unexpected shutdowns can be frustrating, especially if your iPhone is shutting down in the middle of a conversation or when you need it most. This can happen when your battery has a low state of charge, a higher chemical age, or when you're in colder temperatures.

In extreme cases, shutdowns can occur more frequently, making your device unreliable or unusable. If you're experiencing this issue, it's worth noting that some iPhone models, such as the iPhone 6 and later, have a performance management feature that dynamically manages performance peaks to prevent shutdowns.

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This feature works by looking at a combination of the device temperature, battery state of charge, and battery impedance. Only if these variables require it to prevent shutdowns, iOS will dynamically manage the maximum performance of some system components, such as the CPU and GPU.

In some cases, you might not notice any differences in device performance. However, in more extreme cases, you might notice effects such as longer app launch times, lower frame rates while scrolling, or backlight dimming.

Here are some specific effects you might notice:

It's worth noting that these changes are temporary if your device is experiencing a low battery state of charge and colder temperatures. However, if your device battery has chemically aged far enough, performance-management changes might be more lasting.

Avoiding the extremes is key to prolonging your battery's life. Don't worry about charging your battery to 100% or letting it die completely.

Charging your battery to 100% occasionally won't harm it, especially with features designed to protect the battery. This is a relief for those of us who often forget to plug in our devices until they're almost dead.

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Your iPhone battery is designed to last a long time, with lithium-ion batteries rated for up to 500 full charge cycles before they dip to around 80% of original capacity.

To keep your battery healthy, it's essential to check its health regularly. To do this, go to Settings > Battery and tap Battery Health.

Batteries of iPhone 14 models and earlier are designed to retain 80 percent of their original capacity at 500 complete charge cycles under ideal conditions. Batteries of iPhone 15 models are designed to retain 80 percent of their original capacity at 1000 complete charge cycles under ideal conditions.

As your battery health degrades, so can its ability to deliver peak performance. The Battery Health screen includes a section for Peak Performance Capability where the following messages might appear.

If your iPhone is giving up early in the day, a battery replacement can keep it lasting longer. Schedule a fast battery fix with a professional if you need to.

Lithium-ion batteries are also built to last, with a lifespan of about 2–3 years of regular use.

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Replacing an iPhone battery can be a bit of a challenge, but it's definitely doable.

Apple's replacement service costs £49 ($49), which is more than half what you might have paid for the phone itself. The cost can be even higher if you send it in through the mail, which brings the total to around £56 ($75 or AU$105).

iFixit offers a DIY replacement pack for £35 (including postage), which is a significant saving over Apple's replacement. This option also gives you the tools you need for future replacements, so you won't have to buy them again.

The DIY kit costs $30 in the US, with shipping adding around $8 to the total. This means you can save even more money if you're in the US.