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This includes the devices internal storage, power circuits, and the battery itself.

This is only possible through a combination of advanced technologies and sophisticated engineering.

Batteries are a complex technology, and a number of variables contribute to battery performance and related iPhone performance.

All rechargeable batteries are consumables and have a limited lifespaneventually their capacity and performance decline so that they need to be replaced.

As batteries age, it can contribute to changes in iPhone performance.

We created this information for those who would like to learn more.

Compared with older generations of battery technology, lithium-ion batteries charge faster, last longer, and have a higher power density for more battery life in a lighter package.

Rechargeable lithium-ion technology currently provides the best technology for your device.

Battery lifespan is the amount of time a battery lasts until it needs to be replaced.

One factor affecting battery life and lifespan is the mix of things you do with your device.

A batterys lifespan is related to its chemical age, which is more than just the passage of time.

It includes different factors, such as the number of charge cycles and how it was cared for.

Follow these tips to maximize battery performance and help extend battery lifespan.

For example, keep iPhone half-charged when its stored for the long term.

Also avoid charging or leaving iPhone in hot environments, including direct sun exposure, for extended periods of time.

This can be referred to as the batterys maximum capacitythe measure of battery capacity relative to when it was new.

In addition, a batterys ability to deliver maximum instantaneous performance, or peak power, may decrease.

In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery.

One attribute that affects this instantaneous power delivery is the batterys impedance.

A battery with a high impedance may be unable to provide sufficient power to the system that needs it.

A batterys impedance can increase if a battery has a higher chemical age.

A batterys impedance will temporarily increase at a low state of charge and in a cold temperature environment.

When coupled with a higher chemical age, the impedance increase will be more significant.

These are characteristics of battery chemistry that are common to all lithium-ion batteries in the industry.

Electronic components require a minimum voltage to properly operate.

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