Is it full to charge or be free to charge? Why?
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Lujiazui Wen Qing science and technology columnist
11-27 23:03
709 trample
Charge the phone, you can charge it when you are free.
- now, lithium batteries are used, and there is no memory effect of the battery.
The use of cell phone batteries, many people have misunderstandings, the cognition is still in the phase of nickel cadmium battery.
At first, we charge some electrical appliances, so we need to wait for electricity consumption to recharge, because the battery technology is not developed at that time. The most commonly used device is the traditional nickel cadmium battery, which has the memory effect of battery.
The so-called battery memory effect means that batteries will remember users' daily charging and discharging modes and modes. It will be difficult for them to change the mode at long time, so they can't make large charge or discharge.
So the use of nickel cadmium batteries is very difficult: for example, the first use of the "full charge + discharge" cycle two or three times, in order to achieve the activation of the battery capacity. In the process of reusing, it can not be overcharged, nor can it be pulled out.
By now, the battery is used in the mobile phone. Compared with the previous battery, the lithium battery has no memory effect and can be used completely.
In winter 2. mobile phone battery is not durable, is not worn out?
By the time of winter, we often find that the battery is not durable. Don't we charge the battery and fill the battery?
Through the above explanation, it is understood that the use of lithium batteries is not a threshold. So why is the phone's electricity used in the winter?
In fact, the temperature in winter is low, the battery performance is normal, and the battery is generally not durable in the summer.
The principle is that the work of the battery depends on the internal chemical reaction. In the winter temperature point, the electrochemical reaction activity of charge discharge is poor. Because the lower the temperature is, the slower the ion diffusion rate is, and the internal resistance of the battery will also increase at low temperature. The lower the temperature, the worse the membrane permeability of the battery will be.
For these reasons, it is normal that the battery is not durable in winter, and the battery will become durable after the winter.
- when is it needed to be replaced
Although lithium batteries can be used at will, the battery performance will still be discounted when the number of cycles exceeds a certain number.
After 500 cycles charge and discharge, the standby time of the battery will decrease. So when we use a cell phone for two years, we feel the battery is not durable.
Note that if we charge from 50% to 100% from the phone, it's not a full charge, only half a time. So everyone is relieved to follow.
In the case of a daily charge, the cell phone battery will decline in performance after two years, so it is recommended to change the cell phone in two years.
35 comments
Yesky, author of science and technology headlines
03-08 16:43
1338 trample
First of all, it is not advisable to use all the power of the cell phone and recharge it, and the right way is to have an empty charge.
Most mobile phones now use lithium batteries, no longer full discharge, and no more than 12 hours. Multiple pluggable power does not affect the battery, so in actual use, as long as there is a power supply, the cell phone can be filled at any time.
So when will it be the fastest and most efficient?
In terms of efficiency, the charging efficiency is the fastest when the cell phone is left with 15%-20%. So it's not recommended to recharge when the cell phone is too low, because the cell phone will receive too much current. Of course, it is not recommended to charge when the electricity is more than 50%, because it not only has low charging efficiency, but also quickly causes voltage to rise to the 2 peak value and loss battery.
So we see that the mobile phones on the market will remind you to charge when the amount of electricity is 20% (different brands are slightly different), and at 10%, the mobile phone will appear red warning, and the electricity will be too low. In other words, when the cell phone is less than 20%, it starts to cry, and we should feed it.
When the electricity is full, do not continue to charge
Now the lithium battery does not need to be fully charged, and if the cell phone is full of electricity and is connected to the power, it will affect the battery life. Since the mobile phone is full, to keep the power state full, it will continue to charge with the "trickle charge" mode. If you continue to charge the battery, the cell phone battery will be affected by the current, some chemical components will be damaged, affecting the efficiency of use.
In addition, when the cell phone is full of electricity, the internal voltage of the battery will increase and increase the burden of the battery. The lithium battery of mobile phone may generate large amounts of current and cause spontaneous combustion or explosion under special temperature, humidity and poor contact conditions. Overcharge is one of the causes of such problems.
Although the smart phone has the power management chip and the battery protection board on the lithium battery equipment, it can effectively prevent overcharge protection. But long-term overcharging is bound to have a certain impact on cell phone batteries, so in order to improve battery performance, try to avoid overcharging such as overnight charging and charging for a long time