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Why do you have to use the battery to get the most out of it?
- Aug 02, 2018 -

Why do you have to use the battery to get the most out of it?


If the charging time is too long, the liquid in the nickel battery will crystallize, preventing the charger from filling the battery. In this way, in order to maximize its performance, it must be fully charged or periodically discharged. For lithium batteries, we can charge lithium-ion batteries at any time, no need to be as troublesome as nickel batteries.

The rumor about the life of lithium batteries: lithium batteries can only be charged 300 to 500 times, and then need to be replaced.

The correct statement: Lithium battery life is related to the number of completions of the charging cycle, and is not directly related to the number of charging cycles.

A charge cycle means that all of the battery's charge is from full to empty, and then from empty to full. This is not the same as charging a single charge.


First charge 40%, after using it for a period of time, it will be charged 20%. After the next use, it will be charged 30%, then the next 20%... In the middle of the 20%, just added 10% of the power. At the time, a total of one charge cycle is completed. This is followed by the next cycle.

To give a simple example, a lithium battery uses only half of the electricity on the first day and then fully charges it. If it is still the next day, it will be charged in half, and it will be charged twice in total. This can only be counted as one charging cycle, not two. Therefore, it is usually possible to complete a cycle after several charges. Each time a charge cycle is completed, the amount of power is reduced a little. However, the reduction is very small. After a high-quality battery has been charged for many cycles, it will still retain 80% of the original power. Many lithium-powered products are still used after two or three years, which is why. Of course, the life of the lithium battery will eventually need to be replaced.

The life of lithium batteries is generally 300 to 500 charge cycles. Assuming that the amount of electricity supplied by a full discharge is Q, if the amount of power is reduced after each charging cycle, the lithium battery can provide or supplement 300Q-500Q of power in its lifetime. From this we know that if you charge 1/2 each time, you can charge 600-1000 times; if you charge 1/3 each time, you can charge 900-1500 times. By analogy, if you charge randomly, the number of times is variable. In short, no matter how charged, it is constant to add a total of 300Q ~ 500Q power. Therefore, we can also understand that the life of the lithium battery is related to the total charge of the battery, regardless of the number of times of charging. The effect of deep deep charge and shallow charge on lithium battery life is not much different.

In fact, shallow shallow charge is more beneficial for lithium battery. Only when the power module of the product is calibrated for lithium battery, it is necessary to deep charge. Therefore, products that use lithium-ion power supply do not have to be stuck in the process. Everything is convenient and can be charged at any time without worrying about affecting life.

If lithium is used in an environment above the specified operating temperature, ie above 35 °C, the battery's power will continue to decrease, ie the battery will not be as long as usual. If the device is to be charged at such a temperature, the damage to the battery will be greater. Even if the battery is stored in a hot environment, it will inevitably cause damage to the quality of the battery. Therefore, trying to maintain a favorable operating temperature is a good way to extend the life of the lithium battery.


If you use lithium battery in a low temperature environment, that is, below 4 °C, you will also find that the battery life is reduced. Some mobile phones' original lithium batteries are not charged even in low temperature environments. But don't worry too much. This is only a temporary situation. Unlike the use in high temperature environment, once the temperature rises, the molecules in the battery are heated and immediately return to the previous power.

In order to maximize the performance of a lithium-ion battery, it is necessary to use it frequently so that the electrons in the lithium battery are always in a flowing state. If you do not use lithium batteries frequently, please remember to complete a charging cycle for the lithium battery every month, do a power calibration, that is, deep charge deep charge once.