Now on the market using built-in lithium-ion MP3 is very much, because there is no need to replace the battery, so in a sense it is more convenient. But the problem is also significant, that is, the life of the lithium battery problem.
The computer city sales staff in answer to the question about the life of the lithium battery, usually say so "can charge x hundred times". If you really understand this, it's funny. In fact, the correct way of expression should be "the life of lithium batteries, and the number of times the completion of its charging cycle, and the number of charges without any ambiguous connection."
As we all know, one of the advantages of lithium batteries, is to be able to charge the lithium-ion battery at any time at a convenient moment, without having to think about charging after the electricity is used up. So, what do you mean by a charging cycle? A charging cycle means that the battery's full charge from full to empty, and then from empty to full process, which is not the same as charging a single charge. To put it simply, 600 mA lithium battery, you first charged from 0 mA to 400 mA, with ah with ah with N mA; then you charged 150 mA, then with N mA; finally charged 100 mA, when the final charge to 50 mA, this battery a charging cycle is up. (400+150+50=600)
A piece of lithium battery in the first day only half of the power, and then fully charged for it. If it is still so on the second day, i.e., it is charged with half of the charge, and a total of two charges down, this can only be counted as one charge cycle, not two. Therefore, it may usually take several charges to complete a cycle. Every time a charging cycle is completed, the power will be reduced a little. That's why many people who use Li-ion phones often say, "This stupid phone, which could last 4 days when I first bought it, now only lasts 3 and a half days on a single charge". However, this power reduction is very small, high-quality batteries will still retain 80% of the original power after repeated cycles, and many lithium-powered products are still used as usual after two or three years. Of course, the lithium battery life to the end or need to be replaced.
Lithium battery life is generally 300-500 charging cycles. Assuming that a complete discharge supply of electricity for 1Q, if you do not consider the reduction of electricity in each charging cycle, the lithium battery in its life can supply or make up for a total of 300Q-500Q of electricity. From this we know that if each time with 1/2 on the charge, it can be charged 600-1000 times; if each time with 1/3 on the charge, it can be charged 900-1500 times. And so on, if random charging, the number of times is variable. In short, no matter how to charge, a total of 300Q-500Q into the power of this point is stable. Therefore, we can also understand: the life of the lithium battery and the total charge power of the battery, and the number of charges has nothing to do with. Deep put deep charge and shallow put shallow charge for lithium battery life of the impact is not very different. Then, some MP3 manufacturers say, "a certain type of MP3 using strong lithium battery, can be charged more than 1500 times." This is purely to deceive consumers ignorance.
In fact, shallow discharge shallow charge for lithium is more beneficial, as long as the power module in the product for lithium to do the calibration time, only deep discharge deep charge necessary. Therefore, the use of lithium-powered products do not need to be bound to the process, all the convenience first, charge at any time, do not worry about the impact of longevity.
Lithium battery maintenance.
The temperature should not be too high
If the operating temperature is higher than the rules, that is, more than 35 ° C in the environment using lithium batteries, the battery power will be constantly reduced, that is, the battery power supply time will not be as long as usual. If in such a temperature, but also for the device charging, it will be more damage to the battery. Even if the battery is stored in a hotter environment, it will inevitably cause corresponding damage to the quality of the battery. Therefore, try to maintain the operating temperature at the appropriate benefit is a good way to extend the life of lithium batteries.
Too low is not good
If the lithium battery is used in a low-temperature environment, i.e. below 4°C, you will also find that the battery's operating time is reduced, and the original lithium battery of some cell phones cannot even be charged in a low-temperature environment. But don't worry too much, this is only a temporary situation, unlike the use of high temperature environment, once the temperature rises, the molecules in the battery heated, it will immediately recover to the former power.
Life is in motion
To maximize the effectiveness of lithium-ion batteries, you need to use it often, so that the electrons in the lithium battery is always in a state of flow. If you do not often use lithium-ion batteries, please remember to complete a monthly charge cycle for lithium-ion batteries, do a power calibration, that is, deep discharge deep charge once.
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