In fact, whether it is fast charge or slow charge, as long as it is charged, it will cause damage to the battery, which is determined by the charging chemistry of the mobile phone battery.
At this stage, almost all smart phones are using lithium-ion batteries, and the life of lithium batteries is mainly related to the number of charging and the ambient temperature, and the relationship with the speed of charging is very small.
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The charge and discharge principle of lithium batteries is actually the flow of lithium ions between the positive and negative electrodes of the battery, in this process, the active substance of the battery will produce irreversible consumption, the number of lithium ions is reduced, and the battery capacity will also decline. Taking the iPhone as an example, Apple officially made it clear that under normal conditions, the battery charging cycle reaches 500 times, and the maximum capacity of the iPhone battery will be reduced to about 80%, determining that the battery can no longer be used.
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500 charge and discharge life refers to a period when the ambient temperature is 25 ° C, the battery consumes 0 electricity, and then is full to 100% electricity.
Of course, if the damage to the battery is equal to the fast charge and slow charge, it is obviously unrealistic. At present, there are two kinds of fast charge schemes, either to increase the voltage or to increase the current, which will inevitably lose the battery.
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However, mobile phones and charging devices that support fast charging have a complete and reliable battery management strategy that is sufficient to protect the battery and ensure the safety of fast charging.
Taking the iPhone12 as an example, with the green link small Diamond 20W charger, the first 80% of the power is to maintain high power for fast charging, after reaching 80% of the power, the charging current begins to slow down, and fills the remaining 20% of the power in the form of trickle recharge, thereby reducing the damage to the battery and extending the battery life.