The latest Android smartphones have a marketing chip for fast charging. In the Galaxy S5, Samsung’s “fast charge” technology has become “ultrafast.” Motorola has implemented charging technology in the Droid Turbo that can be recharged in up to 8 hours in 15 minutes. HTC has a Rapid Charger 2.0 charger that can charge 2014 devices 40% faster.
In the new iPhone 6 and 6 Plus, we got batteries of greater capacity, but no additional technologies for their quick charge. However, there is a way to quickly charge high-capacity batteries of the iPhone 6 and 6 Plus (and other models). About him, as well as how he affects the battery of devices, will be discussed in this article.
In fact, the solution was always literally before our eyes – a 12-watt charge from the iPad, which produces a current of 2.1 amperes. The question is, why is Apple not talking about this feature separately and can it harm the battery of your smartphone? As for the first part of the question, it’s better to ask the Apple PR department, but the second part can be answered by drawing information from this section of the company’s official website. It says that the iPad charger is compatible with other Apple gadgets, including the iPhone. It turns out that the company knows about this opportunity and confirms it.
In fact, the parameters of the charger provide a slower charging process than is possible. A simple increase in the charge current from 500 milliamps (or 1 ampere) to 2 amperes (charging from the iPad) will significantly speed up the charging process.
You may ask what consequences this may have. Increasing the charge current will cause more heating of the battery, which will also affect the reduction of its resource. Therefore, most people will find charging an iPhone using an iPad charger a bad idea. You can dispel doubts about this by understanding the basics of the principle of charging batteries.
Isidor Bachmann, founder and CEO of Cadex Electronics and author of the book “Batteries in a Portable World”, in his book talks about a key indicator of the C-rate, which determines how much charge a battery can safely receive for itself or the speed at which The battery may be charged / discharged. To determine this coefficient, you just need to take the ratio between the amount of charge and the battery capacity in milliamperes. For example, for iPhone 6, when charging from iPad charging, this figure will be 2100/1810 mA or 1.16 C. For iPhone 6 Plus, it will be 2100/2915 mA or 0.72 C.
The batteries of most mobile devices have a charge ratio of approximately one. Thus, the coefficient calculated above for the iPhone 6 and 6 Plus is in a safe range. Bachmann says battery manufacturers recommend using chargers that provide a ratio below 1 C, but such a slight excess is not at all a cause for concern.
There is another point regarding the fast charging of the batteries of our gadgets. Each of them has a special PMIC controller responsible for the battery charge process. He “communicates” with the charger that you use and requests a certain amount of charge needed by the battery. That is, theoretically, this mechanism is able to protect your iOS device, since Apple clearly indicates the charge parameters. This technology is supported by Qualcomm controllers, which are used in the iPhone 6 and 6 Plus, so we can safely say that accelerated charging will not damage the smartphone and will not significantly reduce its resource.
Here are the charging statistics of my iPhone 5s connected to an adapter from an iPad. As you can see, 2.1 amperes at the input turn the current that is necessary at a certain stage of charging (see paragraph "Charge segment now").
From personal experience I can say that I used this life hack with iPad charging since the days of iPhone 4. I just charged the phone with the adapter that was at hand and most often it was an adapter from the iPad. The charge process is accelerated by more than two times and if you have not discharged your iPhone “to zero”, then in an hour it will be able to charge up to 100%. During this time, I changed several devices, but on none of them did I notice any harmful effects from such a charge. Yes, the battery heats up more, but nobody forces you to hide an iPhone under the pillow while charging, right?