At present, there are many MP3 players with built-in lithium battery in the market. Because there is no need to replace the battery, it is more convenient in a sense. But the problem is also significant, that is the lithium-ion battery life problem.
Computer City salespeople often answer questions about the life of lithium-ion batteries by saying, "It can be charged × 100 times." It would be funny if you really knew that. In fact, the correct way to say it should be "the life of lithium battery, with the completion of the charging cycle is related to the number of times, and no ambiguous connection with the number of charging."
As we all know, one of the advantages of lithium-ion batteries is that they can be recharged at a convenient time, rather than having to recharge them after they have run out. So, what is the charging cycle? A charging cycle means the process of charging the battery from full to empty, and then from empty to full again, which is not equivalent to a charge. To put it simply, on a 600mAh lithium-ion battery, you go from 0 mA to 400 mA for the first time, using N mA for the first time. And then you charge it up another 150 milliamps, and then you use N milliamps; * Finally charge 100 mA, when * final charge to 50 mA, the battery has a charge cycle. (400 + 150 + 50 = 600)
A lithium-ion battery used only half of its charge on the first day, then recharged it. If you use half of it the next day and charge it for two times, it counts as one charging cycle, not two. Therefore, it may usually take several charges to complete a cycle. At the end of each charging cycle, the charge will be reduced a little. This is why many people who use lithium-ion cell phones often say, "This stupid phone, which can last 4 days when I just bought it, can only last 3 and a half days on a single charge". However, this reduction is very small. High-quality batteries will still retain 80% of their original charge after multiple cycles, and many lithium-ion power products will continue to operate after two or three years. Of course, lithium battery life to the end or need to be replaced.
Lithium-ion batteries generally have a lifespan of 300-500 charging cycles. Assuming that the power supply of an effective discharge is 1Q, if the reduction of power in each charging cycle is not taken into account in the future, the total power supply or make up for the lithium battery in its lifetime is 300Q-500Q. From this we know, if each time with 1/2 charge, it can charge 600-1000 times; If you charge it with 1/3 each time, you can charge it 900-1500 times. Similarly, if the random charging, the number of variable. Anyway, no matter how you charge it, it makes up 300Q to 500Q of power in total. This point is stable. Therefore, we can also understand: lithium battery life is related to the total charge of the battery, and the number of charges. The effect of deep charging and shallow charging on lithium-ion battery life is not different. So, some MP3 manufacturers publicity said, "such and such type of MP3 using strong lithium battery, can be charged more than 1500 times." This is pure consumer ignorance.
In fact, shallow charging for lithium battery is more beneficial, as long as the power module of the product is calibrated for lithium battery on time, it is necessary to deep charging. Therefore, the use of lithium power supply products do not stick to the process, all to facilitate the first, at any time to charge, do not worry about the impact of life.
Lithium battery:
Don't get too hot
If lithium-ion is used at temperatures higher than the norm, that is, above 35°C, battery power will be constantly reduced, meaning that the battery will not last as long as usual. If you have to charge the device at these temperatures, the damage to the battery will be even greater. Even if the battery is stored in a hot environment, it will inevitably cause damage to the quality of the battery. Therefore, it is a good way to extend the life of lithium battery to maintain the suitable operating temperature as far as possible.
Too low is not good
If the lithium battery is used in the low temperature environment, that is, the following 4°C, it will also be found that the use of the battery will be cut at the same time. The original lithium battery of some mobile phones can not be charged in the low temperature environment. But don't worry too much. This is just a temporary situation. Unlike high-temperature applications, once the temperature rises, the molecules in the battery are heated up and immediately return to their original charge.
Life lies in movement
To get the most out of lithium-ion batteries, you need to use them often to keep the electrons flowing. If you do not often use lithium battery, please remember to complete a charging cycle for lithium battery every month, do a charge calibration, that is, deep charging once.
