Is charging from 0% to 100% too often harmful to lithium batteries?
2024-02-20
Frequently charging lithium batteries from 0% to 100% may be harmful to them.
Although lithium batteries have a charging protection mechanism, in theory they will not continue to charge after being fully charged, thus not damaging the battery. However, in actual use, overcharging and over-discharging will have an impact on the life of lithium batteries. Overcharging can cause the electrolyte in the battery to decompose, while needle-like crystals form on the positive electrode. These crystals can pierce the battery separator, causing the battery to short-circuit and even risk a fire or explosion.
In addition, the life and health of lithium batteries are also affected by the number of charge and discharge cycles. Each charge from 0% to 100% is equivalent to completing a charge-discharge cycle. Long-term use like this will accelerate battery wear and tear. Although mobile phones and other devices are equipped with battery management systems that can avoid overcharging or over-discharging, keeping the battery low or full for a long time may still cause some damage to the battery.
Therefore, in order to protect the life and performance of lithium batteries, it is recommended to adopt a shallow charge and shallow discharge charging method, that is, try to avoid charging the battery to 100% or discharging it to 0%, but charge it in time when the battery is moderate, and then charge it when the battery is fully charged. Unplug the charger promptly.
When using lithium batteries, try to keep the battery power between 20% and 80%. This purpose is to extend the service life of lithium batteries. Keep the battery charge between 20% and 80%. The main purpose is to extend the service life of lithium batteries.
Specifically, when the power of the lithium battery is lower than 20%, charging should be started to avoid excessive discharge of the battery. Because the life of lithium batteries is related to the depth of charge and discharge, excessive discharge will cause damage to the battery. At the same time, when the battery's power reaches about 80%, charging can be stopped to avoid overcharging. Overcharging can also lead to reduced battery performance and shortened life.
In addition, there are some other usage and charging suggestions that can be used in conjunction with the 20-80% charging rule to extend the life of lithium batteries:
Avoid charging or using lithium batteries in high or low temperature environments, as both high and low temperatures will affect the battery's charge and discharge performance.
Try to avoid frequent deep discharges and deep charges, as this can cause irreversible damage to the battery.
Use appropriate charging equipment and charging methods, and avoid using incompatible or inferior charging equipment.
In summary, the 20-80% charging rule for lithium batteries is an effective way to extend battery life, but it also needs to be combined with other usage and charging recommendations to achieve the best results.
At the same time, for different types of lithium batteries and different usage scenarios, suitable charging strategies need to be formulated based on specific circumstances. In addition, when the device is not used for a long time, about half of the power can be retained to reduce battery aging and damage.
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