When coupled with a higher chemical age, the impedance increase will be more significant. A battery’s impedance will temporarily increase at a low state of charge and in a cold temperature environment. A battery's impedance can increase if a battery has a higher chemical age. A battery with high impedance may be unable to provide sufficient power to the system that needs it. One attribute that affects this instantaneous power delivery is the battery’s impedance. In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery. In addition, a battery’s ability to deliver maximum instantaneous performance, or 'peak power', may decrease. This can be referred to as the battery’s maximum capacity – the measure of battery capacity relative to when it was new. The iPhone 13 bests its competitors in this category, but owes its high overall score to its outstanding discharge efficiency, as its charge up efficiency is very poor.All rechargeable batteries are consumable components that become less effective as they chemically age.Īs 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. The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity. The iPhone 13 provides 3 hours 24 minutes of autonomy after charging for five minutes when the battery indicator displays 20% power remaining. The test results published here are based on the measurements we obtained after the device had stabilized. The device’s power consumption during long idle periods significantly reduced its autonomy results in the earliest runs of our Typical Usage Scenario - for example, we measured a drop of 13% during the second night’s 8 hours of idle time! Our engineers believe this erratic behavior was indicative of the iPhone’s performing background optimization as part of its initial start-up routine, as the behavior disappeared after several days. It must be noted that the iPhone 13’s autonomy performance and battery indicator behaved erratically during the first iterations of our tests, with the phone showing significant power consumption during idle times - problems that users at large have also reported. The Apple iPhone 13 achieves the highest Autonomy score in its segment to date, providing a solid 52 hours of autonomy for moderate use, although this performance is only average across our entire database. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. How long a battery charge lasts depends not only on battery capacity but also on other aspects of the phone’s hardware and software. We compared the Apple iPhone 13’s performance in several key categories with three other Premium devices, the OnePlus 9, the Samsung Galaxy S21 (Snapdragon), and the Oppo Find X3 Neo battery capacity, charger, display type and refresh rate, display resolution, and processor specifications for all four devices are shown in the table below. Given that it has the highest screen resolution, the smallest battery capacity, and the smallest charger among its competitors, the Apple iPhone 13 faces some challenges with respect to autonomy and charging speed.
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