How to charge a smartphone in 15 minutes

Jul

21

2018

and do not turn it into coals
It does not matter how much you bought your smartphone – you need to charge it every day, unless you have a Nokia 3110 or a device with a monstrous battery for 9 000 – 10 000 mAh. Therefore, we have long been treating the smartphone as a tooth brushing, although it takes a lot more time. But there is a way to make this procedure as fast as possible – that’s what Quick Charge and other similar technologies are for.

Modern flagships with a battery for 3000 mAh allow you to charge from 0% to 80% in just 30-35 minutes, and someone does it even faster. The story was put into reality by Qualcomm, which for several years has been releasing chips that are compatible with Quick Charge fast charging technology.

It all started five years ago – in 2013, several dozen smartphones for the first time received support for technology Quick Charge. It allowed for 40% to accelerate charging. But a year later engineers announced the second generation of QC – together with a Snapdragon 800 processor.

How fast charging occurs
The capacity of modern lithium-ion batteries depends on the imagination of the manufacturer – it can be as high as 1,500 mAh, and 9,000 mAh. For such a battery, the rated voltage varies between 3.5 – 3.7 V, and the maximum reaches 4.2 V.

The process of charging a smartphone battery consists of two stages. First of all, the device is charged with a large current until the voltage reaches a threshold value. After that, the charge current is reduced until the battery is fully charged. Charging ends when the charge current is reduced to 3% of the initial value. To prevent the battery from being recharged, a special controller is provided.

The fast charge is to transmit the current of the maximum possible power from the charger in the first charging stage. Qualcomm, for example, developed the technology evenly: Quick Charge 1.0 had the characteristics of 5V / 2A, the whole process was carried out up to 40% faster. QC 3.0 has been supported by INOV, an intelligent voltage selection technology that also accelerates charge recharging. The main “chip” – in the collection of voltages individually for each device (from 3.2 volts to 20 volts). It supports many modern smartphones – Xiaomi Mi MIX 2 , HTC U11 , NOKIA 6 , LG V30 + and others.

But Quick Charge version 4.0 allows just five minutes to charge the smartphone so much that it lasts for five hours of the device. True, now in the world only one smartphone has its support – a game phone Razer Phone. Over time, LG G7 will join it.

Not only Quick Charge
Because of the royalty royalty, many released the alternative solutions Quick Charge. So, for example, OnePlus has Dash Charge, and Pixel from Google uses USB-PD. Many smartphones use TurboCharge, FastCharge and other similar technologies, which in fact operate on the same principle as the standard from Qualcomm.

The manufacturer of chips Mediatek also did not stay aloof – he developed the technology Pump Express. Her third iteration can charge the smartphone from 0% to 70% in 20 minutes! The remaining device will “pick up” in half an hour. Meizu Pro 7 and a number of other devices supported the standard. Provides protection against overheating and support for USB-C. The peculiarity of this technology is that when charging the standard internal circuit is not affected, the current goes directly from the adapter to the battery.

Is it safe?
When this question arises, many recall the sad experience of Galaxy Note 7 – but there, most likely, there was a high percentage of battery rejection, and the non-original charging adapters played a role. But the question is still controversial.

At the moment, the researchers rely on existing battery tests and agree that the battery life in the constant fast charge mode drops. But if you do not charge the smartphone quickly, the battery effects will be negligible.

Than to charge?
Accessories with support for the same Quick Charge 3.0 on the market a lot. In a set with the appropriate smartphones, as a rule, the necessary power adapters are supplied, but some external batteries also have technology. For example, an external BURO battery has 13,000 mAh . However, if there is a need for one more power adapter with fast charging, you can purchase it .

Of course, you should not abuse fast charging, but you can not pass by such a convenient way to save your time. Many constantly charge their smartphones with Quick Charge and other technologies, and after a while the battery wear is the same as when charging with conventional adapters.

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In: A Technology & Gadgets Asked By: [19469 Red Star Level]

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