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Three iPhone models are expected for this September keynote. Apple is preparing to unveil an iPhone 9, iPhone XS and iPhone XS Plus. Price, release date … Here is what we already know.
You do not have to wait very long before knowing all the new iPhone, from their price to their release date. The keynote Apple must indeed be held this Wednesday, September 12, at 19h (French time). Journalists from around the world are expected at the Steve Jobs Theater, at the company’s headquarters in Cupertino. The event can be followed live and video by connecting to the brand’s website at the apple or via the dedicated application on iOS. On this occasion, Tim Cook will end the mystery about the name of future smartphones, which according to the latest rumors should be called iPhone 9 (or iPhone XC), iPhone XS and iPhone XS Plus (or iPhone XS Max).

Before the keynote, we already have some elements on the three models that should be presented by Apple. According to the well-respected analyst Ming-Chi Kuo, the firm to the apple is preparing to launch an iPhone OLED screen of 5.8 inches which would be the evolution of the iPhone X (iPhone XS), a phablet to 6.5-inch OLED screen (iPhone XS Plus), and finally a model offered at a more reasonable price and equipped with a 6.1-inch LCD (iPhone 9). In this keynote of September, Apple should also unveil a new Apple Watch. We take stock of the latest rumors concerning the data sheet of the iPhone 2018, their price and relea

The iPhone X was the first Apple smartphone whose price has passed the psychological barrier of 1.000 euros. At its release, it was proposed to 1.159 euros with 64 GB of storage and amounted to 1.329 euros with 256 GB. Its developments should therefore be sold at a similar rate. Nevertheless, several specialized sites announce an iPhone XS cheaper than its predecessor. 9To5Mac understands that the iPhone XS will be launched between 800 and 899 dollars. Analyst Ming-Chi Kuo is banking on an iPhone XS Plus at $ 1,000 and an iPhone LCD (iPhone 9) at about $ 700.

If you hope to get one of the iPhone 2018 at a good price, know that wait a few months can be a good strategy. The Idealo price comparator looked at the evolution of the price of the previous iPhone in the 11 months following their release. And for the iPhone 9 as iPhone XS, the best would be to acquire a 10 months after marketing. You could then get it at a rate 10% lower than the price of its launch on e-commerce sites like Amazon, eBay, Darty or Rue du Commerce.

Release date and keynote 2018
The three iPhone 2018 will be presented at the keynote on Wednesday, September 12, which will start at 10am (19h, French time). In the last six years, Apple has always chosen a Tuesday or a Wednesday for its event, and rather at the beginning of the month. The release date of the products was generally fixed ten days after the keynote. According to the Cnet site , given the dates chosen by Apple in the past, the iPhone could go out in stores on September 21.

iPhone XS, iPhone XS Plus and iPhone 9 specifications
So these are three models that should be unveiled by Apple in September. According to the different leaks, they should have the same design, close to the iPhone X, with a screen taking the entire front of the smartphone and a notch at the top housing the sensors. All three models should be equipped with facial recognition technology and wireless charging. In addition, it is possible that Apple abandons its Lightning port, to equip the iPhone with a USB-C port, as on the MacBook.

The iPhone XS would be an evolution of the iPhone X. It would have a 5.8-inch OLED screen and a dual camera on the back. The iPhone XS Plus (or iPhone XS Max according to 9To5Mac) would benefit from a 6.5-inch OLED display. Distinctively, it could be used with two SIM cards (for example, to use both its pro and personal line). These models would come out in black, white and in a new color “gold”. According to analyst Ming-Chi Kuo, Apple would keep on its XS models its latest camera, namely two lenses at the rear, a wide angle and a telephoto lens of 12 megapixels, positioned vertically. Shortly after Apple formalized the date of its keynote, it would have inadvertently leaked photos of iPhone XS on the web. Visuals spotted by the specialized site 9To5Mac:

The iPhone 9 (or iPhone XC) should ship a 6.1 inch LCD screen and a single lens in the back. According to Ming-Chi Kuo, cited by 9To5Mac , it could be declined in several new colors: blue, orange, red, gray and white. According to Steve Hemmerstoffer, known for his leaks on Twitter under the pseudo OnLeaks , tests would be made to make it also available in yellow, pink and blue.

Battery and performance of the iPhone
Understand the performance of the iPhone and how it relates to your battery.
Your iPhone is designed to provide a simple and intuitive user experience, and this is only possible by combining advanced technologies and sophisticated engineering. An important technological area is that of battery and performance. Batteries are a complex technology, and many variables contribute to the performance of the battery, as well as those of the associated iPhone. All rechargeable batteries are consumable components and have a limited life span: over time, their capacity and performance are reduced, and they must be replaced. Aging batteries can contribute to iPhone performance changes. We have prepared this information for those who wish to know more.
About lithium-ion batteries
The iPhone’s batteries use lithium-ion technology. Compared to traditional batteries, lithium-ion batteries charge faster, last longer, and have higher power density, resulting in lighter batteries with longer battery life. Rechargeable lithium-ion technology is currently the best technology for your device. Get more information about lithium-ion batteries .

How to optimize the performance of the battery
Battery life is the length of time your device can run before needing to be recharged. What is known as “battery life” is the total life of your battery before you need to replace it. All of the things you do with your camera affect battery life and life. No matter how you use it, you can make improvements. The life of a battery is related to its “chemical age”, which is more than just the passage of time. It combines different factors, such as the number of charge cycles and the maintenance of the battery. Follow these tipsto optimize battery performance and extend battery life. For example, when you store your iPhone for a long time, store it half full. Also avoid charging your iPhone in a hot environment, exposing it to high temperatures, or leaving it in the sun for long periods of time.

Chemical aging of batteries
All rechargeable batteries are consumable components whose efficiency decreases as their chemical age increases.
The chemical aging of lithium-ion batteries causes a decrease in their autonomy, which results in a reduction in the time elapsed before it is necessary to recharge a device. This battery life is sometimes called “maximum battery capacity”, which is the measure of the battery’s capacity compared to the one it offered when it was new. In addition, the capacity of a battery to provide instant maximum performance, or “peak power”, may decrease. For a phone to work properly, the electronic components must be able to instantly obtain battery power. The impedance of the battery affects this instantaneous energy availability. It is possible that a high impedance battery can not provide enough power to the system that needs it. The impedance of a battery may increase if the battery has a high chemical age. The impedance of a battery temporarily increases at a low charge level and in a very cold environment. When this is associated with a high chemical age, the increase in impedance is greater. These are characteristics of battery chemistry common to all lithium-ion batteries.

When power is drawn from a battery with high impedance, the voltage drop across the battery is greater. Electrical components need a minimum voltage to work properly. This includes the internal storage of the device, the power circuits and the battery itself. The power management system determines the battery’s ability to provide this power and manages the loads to maintain operation. When operation can no longer be ensured with all the capabilities of the power management system, the system will shut down to preserve these electronic components. Although this shutdown is intentional from the point of view of the device, it may be unexpected for the user.

Prevention of unexpected stops
With a low charge level, high chemical age, or low temperatures, the probability of unexpected shutdowns increases. In extreme cases, stops may occur more frequently, making the device unpredictable or unusable. On the iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7 and iPhone 7 Plus, iOS dynamically handles peak performance to prevent the device from unexpectedly shutting down. therefore to allow the user to continue to use his iPhone. This performance management feature is iPhone-specific and does not apply to any other Apple product. Since iOS 12.1, the iPhone 8, iPhone 8 Plus and iPhone X integrate this feature,

Pkbazaar.Pk This performance management works by jointly examining the temperature of the device, the battery charge level and the battery impedance. Only if these variables require it, iOS will dynamically handle the maximum performance of certain system components, such as the CPU and GPU, to prevent unexpected shutdowns. As a result, the workloads of the device will self-balance, allowing a more even distribution of system tasks instead of high and sharp peaks of performance occurring at once. In some cases, the user may not notice any difference in the daily performance of the device.

In cases that require more extreme forms of this power management, the user may note the following effects:
Slower application launches
Frequencies of weaker images when scrolling
Backlight dimming (which can be rejected in the control center)
Speaker volume reduced to -3 dB
Gradual reduction of frame rate in some apps
In the most extreme cases, the camera’s flash will be disabled, and this will be indicated in the camera’s user interface.
Apps that refresh in the background may require reloading at launch.
Many key areas are unaffected by this performance management feature, including:

Mobile call quality and network throughput performance
The quality of captured photos and videos
GPS performance
Location accuracy
Sensors such as gyroscope, accelerometer, barometer
Apple Pay
In case of low load and low temperatures, performance management changes are temporary. If a device’s battery reaches a sufficiently advanced chemical age, performance management changes may take longer. This is due to the fact that all rechargeable batteries are consumable components and have a limited life, and they must eventually be replaced. If you find yourself in this situation and you want to improve the performance of your device, it may be useful to replace the battery of it.

For iOS 11.3 and later
iOS 11.3 and later enhances this performance management feature by regularly evaluating the level of performance management needed to avoid unexpected shutdowns. If the state of the battery satisfies the peak power requirements observed, the level of performance management will be decreased. If an unexpected shutdown occurs again, the performance management will be increased. This assessment is continuous and allows for more adaptive performance management.

The iPhone 8 and later models feature a more advanced hardware and software design that provides a more accurate estimate of power requirements and battery power capacity to optimize overall system performance. This provides a different performance management system, which increases the accuracy with which iOS anticipates and avoids unexpected shutdowns. Thus, it is possible that the impacts of performance management are less noticeable on the iPhone 8 and later models. Over time, the rechargeable batteries of all iPhone models will see their maximum capacity and performance decrease and need to be replaced.

Battery status
On the iPhone 6 and later models, iOS 11.3 and later add new features to display the status of the battery and, if necessary, to recommend its replacement. They are in Settings> Battery> Battery Status.

In addition, users can see if the Performance Management feature that dynamically handles maximum performance to avoid unexpected shutdowns is enabled, and they can choose to disable it. This feature is only enabled after the first unexpected shutdown on a device with a battery that has reduced the capacity to provide instantaneous peak power. This feature is available on the iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7 and iPhone 7 Plus. Since iOS 12.1, the iPhone 8, iPhone 8 Plus and iPhone X integrate this feature, but it is possible that the impacts of performance management are less noticeable on these devices because of their hardware and software design more advanced.

(Note: On devices running iOS 11.2.6 or earlier, performance management will initially be disabled  and will only be enabled if the device experiences an unexpected shutdown.) All iPhone models feature fundamental performance management that ensures that the battery and the overall system work as expected and that internal components are protected. It notably evaluates the behavior at high or low temperatures and the management of the internal tension. This type of performance management is necessary to ensure the safety and normal operation of the device, and can not be disabled

Maximum capacity of your battery
The Battery Status screen includes extensive information on the maximum capacity of the battery as well as its optimum performance capability.

The maximum capacity of the battery is a measure of the battery’s capacity compared to its new condition. A battery will lose capacity as its chemical age increases, which may result in fewer hours of use between refills. Depending on the length of time between making the iPhone and its activation, the battery level indicator may indicate a charge slightly less than 100%.

A normal battery is designed to retain up to 80% of its original capacity after 500 full charge cycles under normal operating conditions. The one-year warranty includes service coverage in the event of a defective battery. If the device is no longer under warranty, Apple offers the replacement of the battery for a fee. Get more information on charge cycles.

As the condition of your battery deteriorates, its ability to provide optimal performance decreases. The Battery Status screen includes a section on maximum performance capacity in which the following messages may appear.

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