1. The loss of the battery is calculated in units of charge and discharge cycles.
2. Not only fast charge, even if the standard charging head of 10w (5v2a) routinely charges the battery, it will cause considerable loss to the battery.
3. For example, a flagship mobile phone, used for half a year, the original charger (18w QC3.0) is normally charged (discharge to 30% and then charged to 100%), resulting in a loss of 7%. In other words, charging to 100% will cause 1.6 cycles of loss.
4. At present, there are two types of mainstream fast charge solutions, and I may not be able to say all of them, but it is roughly like this.
(1) Multi-grade voltage and current control, the iterative process is the process of refined voltage control, representing the protocol: Quickcharge1.2.3.4.4, USB Powerdelivery 1.2.3, where USB PD transmission capacity can even reach an astonishing 20v5a, that is, 100W. Of course it's not for cell phones.
The basic working principle (abstract, do not spray) is to connect the charger → the charger sends a signal → the device accepts the signal → the device returns the signal → the charger accepts the signal → the handshake is successful → the charger provides power with the maximum receiving capacity of the device.
Why does he achieve fast charge in the way of multi-grade voltage control? I will give you an example to understand. Look at this charger:
He is a standard 60W, PD charger, he supports the gear are: 5v2a, 9v2a, 12v2a, 15v3a, 20v3.25a. Five full gears. (Of course, the phone supports up to 12v2a)
(2) The second, brainless low voltage, high current. Little gear change, either brute force output or trickle charging.
Representative agreement: 1. A magic change microB interface charger sells 150 yuan a charging line sells 80 a charging five hours of two minutes of the two big factories. 2. A wild cow charging system for the coquettish purple tongue. 3. Some hammer generation 22w charger I can't remember.
The implementation is much the same.
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However, one point needs to be clarified: the greater the
charging power, the greater the battery loss under the same conditions.
The original intention of asking this question is just to wonder whether the fast charge should be used, worrying that the battery will produce more than expected loss. In fact, such concerns are completely redundant, not to mention the fast frequency of mobile devices upgrading today, even if you use fast charge every day to charge, before you change the normal mobile phone, your mobile phone battery life will still be in an acceptable range.
After all, talent is the dominant mobile phone, and enjoying the convenience brought by scientific and technological progress is the meaning of science and technology. Worrying about your phone every day is not the right way to turn it on.
If you're still worried, then I have an idea. Here's a way to reduce battery wear.
Remember I mentioned earlier that \"charging to 100% will cause 1.6 cycle loss\"? So since charging to 100% will cause so much loss, not full loss will not be a little smaller?
宾果!
The process of electronics entering the mobile phone from the socket can actually be seen as the process of people entering the bus, when there are fewer people on the car, it is very easy and very fast, which is why the fast charge is very fast when the battery is low. When the person in the car reaches a certain degree, the person becomes difficult, at this time the fast charge will slow down, when the car is close to full, the battery is charged to more than 80, the person is very difficult, then it is completely forced into the battery by high voltage. The loss of the battery is self-evident.
We get such a curve, the battery loss per cycle with the reduction of the amount of charging, will be exponentially reduced, for example, or this certain meter flagship machine, when charging to 100%, resulting in 1.6 cycle loss, and when charging to 80%, it only causes 0.6 cycle loss. When charging to 71, only 0.2 cycle loss is caused. Charging to 65, theoretically no loss. But this goes against the long battery life of the phone. So there is no such thing as the best of both worlds!
To sum up:
No matter fast charge or slow charge, which makes you happy which is a good charge, regardless of the charger original factory, avoid mobile phone overcharge is king.
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The following is the usual time for long answers.
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Which of the two power supplies on the picture is better? If the first one costs 250, the second one costs 200, and you only have 230, which one would you choose?