Your iPhone is designed to be simple and easy to use, and this is only possible through a combination of advanced technologies and sophisticated engineering. Understanding how your iPhone works and how your battery affects performance can help keep your device running smoothly.
Batteries are a complex technology with several variables contributing to iPhone performance. All rechargeable batteries will eventually degrade in capacity and performance, and this can cause changes in iPhone performance over time. This article is for those who want to learn more about how batteries affect iPhone performance.
iPhone's Lithium-Ion Batteries
iPhone batteries use lithium-ion technology, which charges faster, lasts longer, and has a higher power density than older battery technologies. Rechargeable lithium-ion technology is currently the best option for your device. Learn more about lithium-ion batteries.
Maximising Battery Performance
Battery life refers to the time a device can be used before it needs to be recharged. Battery lifespan is when a battery can be used before it needs to be replaced. How long a battery lasts depends on how the device is used. No matter how you use your device, there are ways to help extend the battery's life.
Your iPhone battery will last longer if you take good care of it. That means not letting it run down to zero per cent and not charging it up to 100 per cent too often. It's also best to keep it out of hot environments.
When Lithium-Ion Batteries Chemically Age
All rechargeable batteries will eventually die out and become less effective over time. As lithium-ion battery ages, it will hold less of a charge and will need to be recharged more often. This is referred to as the battery's maximum capacity, which measures how much power the battery had compared to when it was new. In addition, the battery's ability to deliver a sudden burst of power, or peak power, may also decrease.
A phone's battery must be able to provide instantaneous power to the phone's electronics for the phone to function properly. The battery's impedance (resistance to current) affects its ability to offer this immediate power. A higher chemical age and a low state of charge will increase the battery's impedance, making it more difficult for the battery to provide the power needed by the phone.
A battery with a higher impedance level will cause a greater drop in voltage when power is pulled from it. Electronic components need a minimum voltage to work properly, including the device's internal storage and power circuits and the battery itself. The power management system assesses the battery's ability to supply the necessary power and regulates the loads accordingly to keep the device running.
When the system can no longer support the loads with the full power management capabilities, it will initiate a shutdown to preserve the electronic components. Even though this shutdown is intentional from the device's perspective, it may be unexpected to the user.
Overall, battery performance variations are expected and normal as part of the natural aging process. However, there are many times when a battery's age can be accelerated by external factors, such as a very high or deficient state of charge, high temperatures and frequent charging. The iPhone battery and the rest of the phone's electronic components work together to manage power, so a degraded battery can cause the phone to lose performance and functionality.
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