Specifications of iPhone 8 and iPhone 8 Plus

With Apple's iPhone, it's fair to say that the battery is a mystery box. Unlike some of its competitors, it is not removable, so you should be sure that what you are getting is really good. When buying a used iPhone, a good battery is just as important as a good appearance.

Luckily, in this guide, we'll answer some frequently asked questions about iPhone battery replacement, from understanding good capacity levels to typical iPhone battery performance across different models.

Everything mentioned in this guide applies to all current and latest Apple smartphone models. Where appropriate, we have indicated how different models work with batteries. Overall, however, this comprehensive iPhone battery guide will be useful whether you're looking to buy an iPhone 7 or an iPhone 12.

iPhone battery capacity

With the release of iOS 11.3 in 2022, Apple introduced a new feature that can tell you a lot about the capacity and function of your battery: battery health. It describes exactly how long your iPhone should last between charge cycles, on a scale from 0% to 100%.

Your phone's maximum battery capacity decreases over time. New iPhones typically have 100% capacity, but charging cycles and potential damage (such as exposing the phone to extreme temperatures) reduce capacity.

As your battery's health deteriorates, so does its ability to deliver peak performance.

Order an iPhone battery replacement from a service center in Moscow

If the tips for increasing the battery life of your iPhone did not help you, this means that there are problems with the device’s battery and it needs to be replaced. The service technicians will conduct a free diagnosis of your iPhone, determine the cause of the malfunction and carry out repairs. You will receive a 30-day guarantee on the finished work. You can also exchange your iPhone for a new one with us at an additional cost. Our branches are located near Arbatskaya metro station and Bagrationovskaya metro station. If it is inconvenient for you to get to us, order delivery within Moscow. For more details, call or request a call back.

Bagrationovskaya Arbatskaya

What is the optimal iPhone battery capacity?

You might think that since your iPhone's maximum capacity starts at 100%, that's the only condition that can be considered optimal. However, this is not quite true. Apple considers any iPhone with 80% battery capacity or higher to be in optimal condition.

In fact, Apple takes battery health so seriously that its one-year warranty covers any battery with 80% capacity or more. It's not unusual to see iPhones that still have 95% or higher battery capacity after one year.

The reason is fault tolerance: Apple builds its batteries with excess capacity, meaning that it doesn't actually use all of its potential operating power when the battery condition is 100%. Even at 80%, your phone is still operating in optimal conditions.

Which iPhone model battery holds a charge better?

Before the release of the iPhone X, Apple adhered to the concept of a junior and senior version of the iPhone in a series, which differ significantly in autonomy. But the XS, XS Max and XR models have about the same runtime. Subcategories of already released iPhones by autonomy:

1. Standard versions of the iPhone of previous series are 6, 6S, 7, 8. With active use of the devices, they may not last until the end of the day. The same applies to the SE model.
2. Improved versions of iPhones of previous series - 6 Plus, 6s Plus, 7 Plus, 8 Plus. With active use, at the end of the day the devices have about 30% charge left.
3. iPhones of new series – X, XS, XS Max, XR. These are phones that, with active use, will have enough charge until late at night.

On a note!

The iPhone XS and XS Max have almost the same battery life. But the XR is a record holder, the best iPhone ever released in terms of battery life, although its battery capacity is even lower than that of the XS Max. The reason for the excellent battery life is the energy-efficient LCD screen technology and lower HD+ resolution – 1792*828 pixels.

Apple still doesn't have a smartphone that can be used for several days without recharging. IPhone is about stable operation with daily charging, and due to the small battery, the devices remain compact and light. If you need your iPhone to be guaranteed to survive into the night even with very active use, choose the “plus” or new version. For stable, but not voluminous work, the “junior” options are suitable.

How to Check Your iPhone's Battery Health

On any iPhone running iOS 11.3 or later, you can check the battery capacity by going to Settings > Battery > Battery Health. It's important to note that this feature is only available for iPhone 6 and all subsequent models.

On the battery status screen, you'll also see an important secondary metric: peak performance. Due to the above nuance, this factor may be more important than capacity.

If your battery is performing optimally to support all your apps, you'll see a simple message telling you that your phone is running at normal maximum performance. If your battery is worn out and may need to be replaced, you will see a warning that it is worn out and should be replaced.

If you see a warning message, your phone will still work, but the time between charges will be significantly shorter. The message only appears when the battery level is 79% or lower.

↑ Screen and camera

The general characteristics of the display panels of the iPhone 8 and iPhone 8 Plus have also not undergone major changes. These are the same IPS screens, but with improved color reproduction thanks to support for the DCI-P3 and HDR color space. The pixel density remained the same: 326 ppi in the case of the 4.7-inch model and 401 ppi in the 5.5-inch.

It should be noted that here and there the True Tone function has appeared, which adjusts the hue of the display colors at its own discretion. The picture becomes a little yellowish, but the eyes get tired much less.

Cameras began to shoot better, despite the fact that their characteristics remained virtually unchanged. iPhone 8 received one 12-megapixel module with an f/1.8 aperture, optical stabilizer and autofocus. His brother has acquired a pair of lenses that have sensors with the same resolution (12 MP), but with different apertures. The main module boasts an f/1.8 aperture, and the secondary module has an f/2.8 aperture. There is an LED flash at the back, and Retina Flash is used to highlight selfies.

The selfie camera on both phones has a 7-megapixel sensor with f/2.2 aperture.

How to Extend Your iPhone's Battery Life and Performance

Apple has tried to extend the battery life of its phones through something called performance throttling, or performance management, which caused controversy a few years ago. Performance Management reduces your phone's performance on your behalf to keep your iPhone running and saving battery. You can turn it off manually, but if you do this, your iPhone's battery will drain very quickly as the iPhone will be running close to its maximum capacity.

Instead, it makes sense to take these few simple steps that can extend your phone's battery life, courtesy of Apple:

• Stay on the latest iOS update. Every major update includes new features to preserve and extend battery life.
• Try to keep your phone at a temperature between 16 and 22 degrees Celsius on average. Anything higher or lower can damage your lithium battery.
• Avoid excessive heat when charging. Some cases or surfaces can cause your phone to heat up, which can damage your battery. Check it while charging to make sure it has cooled down.
• Keep your phone half charged. Draining the battery completely can cause it to become deeply discharged, causing significant damage.
• Turn on auto brightness. The brightest screen settings tend to drain your battery quickly, forcing you to go through charging cycles quickly and drain your battery.
• Check your background activity in Settings > General > Background Update. Too many apps running in the background drain your battery.

Slower draining, faster (and easier) charging

Apple's widely rumored plan to improve battery life includes faster charging, giving users the ability to power off their iPhone in less time. Specifically, Apple is expected to accomplish this via USB Type-C Power Delivery released over the lightning cable.

Combined with the 2-cell, L-shaped battery pack design, Apple can make the iPhone 8 charge faster than any model.

iPhone 8 capacity

Apart from faster wired charging, there is also talk that this year's flagship iPhone 8 will introduce contact-based wireless charging. Less about speed and more about convenience, wireless charging will allow users to juice up their device by simply placing it on a compatible charging pad.

How iPhone batteries perform depending on individual models

When researching used iPhones, battery life and performance are likely among your top considerations. You can look at factors like processing speed or RAM, but how much does that really tell you about the actual user experience of the phone?

Fortunately, there are other indicators. One of them is the Geebench benchmark test, which standardizes all iOS devices to directly compare their performance with each other. The results, from highest to lowest performance, are as follows:

• iPhone 12 Pro Max – 1599 units
• iPhone 12 Pro – 1587 units
• iPhone 12 – 1563 units
• iPhone 12 mini – 1548 units
• iPhone 11 Pro Max – 1330 units
• iPhone 11 – 1280 units
• iPhone XS Max – 1110 units
• iPhone XR – 1108 units
• iPhone 8 – 922 units
• iPhone 7 – 742 units

Battery life is another important component when comparing iPhone models. AnandTech specialists analyzed the battery life of each iPhone model over the past few years. They based their comparison on the amount of time it would take the phone to fully charge the device when connected to a Wi-Fi network. Their results are below:

• iPhone 12 Pro Max – 20 hours
• iPhone 12 Pro – 17 hours
• iPhone 12 – 17 hours
• iPhone 12 mini – 15 hours
• iPhone 11 Pro Max – 15.58 hours
• iPhone 11 – 14.03 hours
• iPhone XR – 12.95 hours
• iPhone 8 Plus – 11.83 hours
• iPhone XS Max – 10.31 hours
• iPhone 7 – 9.22 hours

Trends in both performance and battery life tend to be linear. Each new model tends to be more powerful than the previous ones and has new features that preserve and extend battery life.

The bottom line is that newer models, whether their capacity is below 100%, generally have longer battery life than their older counterparts and will last longer as a result.

iPhone 8 Capacity Efficiency

According to KGI Securities analyst Ming-Chi Guo, Apple plans to use a complex logic board called a substrate-based motherboard to allow the iPhone 8 to increase capacity.

Reducing the size of the motherboard also has the added benefit of improving power efficiency. Larger batteries and more efficient parts have led Kuo to predict that the "iPhone 8" will boast even better battery life than the iPhone 7 Plus.

Additionally, it is also widely rumored that the "iPhone 8" is making the transition to an OLED display, ditching the old LCD panels that have been found in all iPhone models to date. This change can be significant for battery life in several ways,

iPhone 8 capacity

Like a smaller motherboard, OLED is also more efficient, consuming less power in some use cases thanks to the lack of a backlight. While the entire LCD screen requires a backlight, OLED pixels are highlighted separately, saving space as well as no power wasted on "black" or fuzzy pixels.

Reducing components in smartphones has been a necessary step over the years as battery technology itself has not improved significantly. Chips and other parts continue to get smaller and more energy efficient, paving the way for more room for batteries.

It is speculated that Apple plans to use the expanded space in the "iPhone 8" with an all-new 2-cell, L-shaped battery design. According to Kuo, this new battery design will also provide faster charging speeds.

Find out the charging time of your battery

The most successful, according to user reviews, are the Iphone 5 mobile phones in various modifications. They are characterized by four-inch screens and good battery capacity.

Not long ago, Apple released another modification of the fifth generation iPhone SE, the battery capacity of which was 1642 mAh. At the same time, these mobile devices are most often used by conservatives, since those who have tried later models rarely return to four-inch options.

So, the battery capacity of the fifth generation models is (in mAh):

• 5 – 1440;
• iPhone 5S – 1560;
• iPhone 5 C – 1520;
• iPhone SE – 1642.

If we consider that the battery capacity of the fourth generation iPhone was no more than 1420 or 1430 mAh, then we can confidently say that this figure in fifth generation mobile phones has not increased too much. However, the owner of such a model feels protected throughout the whole day, since he may not have to think about where to recharge the device.

At the same time, the iPhone SE has slightly increased its battery capacity, but has not yet been able to catch up with the sixth generation model, although it is reliable, safe and stable for a beginner and budget user.