As the battery chemistry ages
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2021/10/27 17:21:18
All rechargeable batteries are consumables and their performance degrades as they chemically age.
As lithium-ion batteries age chemically, the amount of energy they can store declines, reducing the amount of time devices can last before they need to be recharged. The amount of energy a battery can store is called its maximum capacity, which is relative to a new battery. In addition, the battery's ability to provide maximum instantaneous performance (known as "peak power") may be diminished. For a phone to work properly, its electronics must be able to rely on the battery's instantaneous power output, and one of the factors that affects that instantaneous power output is the battery's impedance. Batteries with high impedance may not provide enough power to the system. When the chemical age of the battery is high, the impedance may increase. Under low charge and low temperature conditions, the impedance of the battery will temporarily increase, and the increase in impedance will be more obvious due to the higher chemical age. These are the chemical properties of batteries, all lithium-ion batteries in the industry.
When you draw power from a battery with a higher impedance, the voltage of the battery drops dramatically. The normal operation of electronic components requires a certain minimum voltage. This includes the device's internal storage, power circuitry, and the battery itself. The power management system determines the power supply capacity of the battery and also manages the load to keep the device running. If the power management system cannot support the device at full capacity, the system will shut down to protect these electronic components. While the shutdown is intentional on the device's part, it may come as a surprise to users.
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