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How to choose a charger for your smartphone or other devices — everything about volts and amperes
Dec 15,2021, 217
Nowadays, more and more smartphone manufacturers are loudly broadcasting: “Our device supports 60 watt fast charging”, “We introduced a new charging standard – 80 watts!” Vivo went even further by releasing Super FlashCharge with 120 watts. This is certainly good as an engine of progress, but it is confusing for users. Let’s figure it out.

Physics 101 or “What is “slow” charging?”
The main indicator of the charger is the power it gives out. Let’s go back to fifth grade for a minute. The product of current strength (amperes, A) and voltage (volts, V) is power (watts, W), according to the formula W = I · U. Now let’s go back to real life, and what do we see? We see a sad picture – the vast majority of smartphone users do not understand this. Few people know the charging characteristics of their gadget. We will fix it.

Before delving into the variety of fast chargers, we’ll figure out what the standard, “slow” charging implies. The answer is simple – anything. There is no description of the technical standards for “slow” charging. Until 2013, when Qualcomm brought the Quick Charge technology to the masses, the chargers were simply charging, and after that they were divided into fast and not so fast.

Nevertheless, the standard is usually 5 V, with a current strength of 1.0, 1.5, 2.0 and 2.2 A, that is, from 5 to 11 watts. Everything above is classified as fast charge.

How to learn to understand your charger
We will develop our technical literacy and learn to understand the information that the manufacturer of chargers indicates. So, the charging label can tell us which modes this charger supports. Of course, if it is not made in a dark Chinese basement. We take two chargers that were laying nearby, and consider their capabilities.

First of all, we will find the word “Output”, all that follows is the current and voltage parameters from the device. We look: 5.2V-2A, 7V-2A, 9V-2A, 12V-2A. Multiplying volts and amperes, we recognize four supported operating modes – 10.4 W, 14 W, 18 W, and 24 W. The charger can work slowly, to support outdated smartphones without fast charging, and has three fast modes.

Three power options are designed not for three different smartphones, but for one. The fact is that at a maximum value of 24 W, the smartphone does not charge all the time, but up to about 60% of the battery capacity. After it goes to 18 watts and so on downward. The point is to prevent the battery from overheating. After all, more power = more heat.

Charging # 2
We see: 5V-2.5A, 9V-2A, 12V-1.5A. We learn the power – 12.5 watts, 18 watts and… 18 watts. This charger offers us a standard mode, and two equally fast 18 W modes. What for? Well, ask Xiaomi. As you can see, this charger is simpler, and has only two fast charging modes (in fact, only one).

Now let’s choose
We simulate the situation – you lose the charger, and you are standing: a) at the station, b) at the airport, c) in the middle of the room, with a confused look. We pull ourselves together, open the website of the manufacturer of your smartphone, enter our model and look at the charging characteristics. Have you found it? It should be something like: “Support for fast charging 40 watts.” It is also important to know the fast charging technology. For example – Quick Charge 3.0. Now you can start choosing the charger.

So, we know that the smartphone supports a maximum charge power of 40 watts. And we know that intermediate values ​​are also important – battery overheating, remember? Weed out all chargers not related to QC 3.0. Even if among other fast charging technologies (for example, Pump Express) we come across a device with the necessary characteristics, it is not a fact that they will make friends with our smartphone.

We have the remaining chargers with the technology we need. We choose. Let’s say the first one that caught our attention has a maximum power of 12V-2.5A. And this is 30 watts, not enough. We look further – 20V-2A, this is 40 watts, exactly what you need! We look at the intermediate values ​​and, if everything suits us, we buy it. If the charger’s power turned out to be higher than that supported by the smartphone

Conclusions
As you can see, having understood the conversion of volts and amperes to watts, you can easily determine the output power of the chargers. When choosing a charger, focus primarily on the fast charging technology used in it. It is preferable to use the same technology in a smartphone.

Then you need to pay attention to the power supported by the smartphone. It is enough to simply compare the characteristics of the smartphone and the charger, and then the choice of the latter will not be a problem.

 
 
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Hong Guang De Technology India Pvt. Ltd.(HGD India) are Premium Manufacturers, Suppliers and Exporters of High End Smart Android Mobile Cell Phone Electric chargers and Adapters. Our premium Mobile Cell phone charger range includes both OEM and ODM chargers. We are suppliers to top Mobile phone and both black and white chargers are available ranging from Wall Wired Chargers, Wall chargers, Smart Multi Chargers, Android Multi Port Chargers, Multi Pin Chargers, Fast Wall Chargers, Android Portable Chargers, USB and Dual USB Chargers, USB Fast Chargers, USB Smart Chargers, Dual USB Wall Fast Chargers, 1 amp, 2 amp, 3 amp chargers also 2.4 amp, 0.5 amp, 0.7 amp mobile charger variants are available. We are suppliers and exporters to Bulk and wholesale Mobile charger traders, OEM chargers requirements to direct companies. Our Mobile chargers manufacturing plant is an state of art infra with a capacity of 5 million chargers per month.


We cater to Indian consumers across India including Maharashtra, Uttar pradesh, Madhya Pradesh, Kerala, Tamil Nadu, Karnataka, Gujarat, Delhi, Bangalore, Hyderabad, Kanpur, Kolkata, Surat, Pune, Jaipur, Lucknow, Indore, Guwahati, Patna, Mumbai and all other Indian states. We are also exporters to Bangladesh, Africa and Nepal.


Apart from manufacturing smart mobile USB Chargers, we also manufacture Car chargers, DTH Set Top Box Electric power adapters ranging from 9v Electric power set top box adapter to 12v electric power supply set top box adaptors.