Does fast-charge technology affect battery life?

This is probably the majority of users are most concerned about, no matter how developers hype, the user is still most concerned about the impact of their mobile phones, especially battery life.

First put the conclusion that the current fast-charging technology is an impact on battery life, but do not have to worry too much, because you may not use the battery life end and will replace for the phone.

And then to analyze why, now the vast majority of mobile phone batteries on the market is still a lithium battery. Today's fast charge technology, whether it is QC2.0, PEP or VOOC, the phenomenon of heating in the charge can not be completely avoided, the difference lies only slightly or serious.

For lithium batteries, high temperature work in addition to the normal charge and discharge, Inevitably accompanied by some side reactions, such as electrolyte decomposition, the electrode generated deposits and so on. These have a battery life on both the impact of large and small. The maximum capacity of the battery, battery power display will be the result of these side effects are affected. As for the size of the impact naturally with the degree of heat and different.

However, the safety of fast charge technology can be guaranteed, first, as mentioned at the beginning of the 

current size relative to the technology is not very high, the second is the developer in the development of fast 

charge technology will also charge the internal, mobile phone internal even within the battery to adjust accordingly to adapt to a larger current, but also set different protection measures to ensure safety, so this can be assured. Of course, the premise is the user's normal use of the original charger and battery. 

What is fast charge?

Recently to see such a question: "From 2014 onwards, fast charging technology after another, the most representative of the technology Qualcomm Quick Charge2.0, MediaTek's Pump Express, there OPPO VOOC, representative models have millet note , Meizu MX5, OPPO Find7. What are the above characteristics of these technologies, and also among the early years of rumors, high-current fast charge will cause the battery overheating, damage battery life, then the fast charge technology will affect the battery life?

Now the rapid development of mobile phone technology, in addition to the hardware itself is constantly updated mobile phone, charging this step is also increasingly subject to the developer's attention, as mentioned in the above question, fast charge technology from 2014 began to unveil the market , The major mobile phone brands have to fast charge as a major highlight of publicity.

Fast charge in short is fast charging, generally can reduce the charging time by half or more, but currently can only be used in the field of mobile phones.

First of all, briefly describe the three stages of mobile phone lithium battery charging, namely: constant current pre-charge, high current constant current charging and constant voltage charging. The standard for three-stage conversion is the battery voltage.

Constant current precharge can be seen as a protective measure, in order to allow over-discharge of the lithium battery slowly restored for the next stage to do a large current charge buffer. When the battery voltage is higher than 3.0V when it entered a large current constant current charge, the appropriate increase in the charge current, different battery current size from 0.1C to several C floating.

This stage, the state recommended standard is 0.1C current charge (C is the battery capacity), the benefits of the standard charge is naturally safe and stable. But the drawback is that for too long, as in the past, mobile phone charging usually takes five or six hours or seven or eight hours. The fast charge is at this stage with more than 0.1C of current.

General fast charge current is 0.2C ~ 0.8C, in fact this figure is not high for today's technology, so fast charge or safe. When the voltage rises to 4.2V when the charge to enter the final stage - constant voltage charging, when the voltage is constant, the current is getting smaller and smaller until full.