18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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CR2450 battery

release time:2024-04-03 Hits:     Popular:AG11 battery

  What are fast charging and slow charging? Which charging method is beneficial to extending CR2450 battery life?

  Nickel metal hydride batteries also have a memory effect, but it is not as obvious as nickel cadmium batteries. The least obvious memory effect is lithium batteries. The memory effect is not obvious, which means that it can be charged multiple times, even after every use without too much impact. Therefore, when using nickel-metal hydride batteries, nickel-metal hydride batteries also have a memory effect, but it is not as obvious as nickel-cadmium batteries. The memory effect is least obvious in lithium batteries. The memory effect is not obvious, which means that it can be charged multiple times, even after every use without too much impact. Therefore, when using nickel-metal hydride batteries, you can generally charge them directly without considering discharge. Of course, from the perspective of extending the service life, a deep discharge can be performed to restore the maximum capacity after charging and discharging about 30-50 times.

  So let’s first take a look at what is fast charging and what is slow charging.

  Taking the nominal capacity of a battery as 1C, a charging current of 0.1-0.2C is slow charging, >0.2C is fast charging, >0.8C is ultra-fast charging, and <=0.05C is trickle charging. . Taking a 1400MAH nickel-metal hydride battery as an example, the charging current between 140MA and 280MA is slow charging, while the same charging current of 280MA is fast charging for a 700MAH battery. It can be seen that fast charging or slow charging is a relative concept, which is closely related to the capacity of the battery itself.

  Going back to the previous question, is it better to go faster or slower? In fact, there is no fixed answer to this. Many people think slow is better and think fast charging will harm the battery. Will fast charging harm the battery? The answer is yes, but the reason is not that high current charging harms the battery as many people think. High current is at best an accomplice. The real cause is heat, which is caused by high current. Excessive temperature has a great impact on battery life. Therefore, large current is not terrible. What is a headache is how to solve the problem of heating.

  Using the pulse method to make a fast charger is a good solution, but for some abnormal requirements, such as a 1-hour fast charger, when an ultra-high-speed charging current greater than 1C is used for charging, the pulse method is insufficient. The method currently used internationally is basically a combination of pulse method and depolarization reaction. To put it simply, based on the pulse method, when the upper half of a sine wave is completed, a cosine wave with a short negative voltage is inserted to offset the excessive current and generate huge heat (polarization reaction), thereby reducing the battery Keep the heat under control. This method is generally only used on more professional chargers, such as those used by model aircraft players. This type of charger can often charge the battery with a current of 2C-3C.


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