The technological process does not stand still, and modern phone manufacturers are releasing more and more sophisticated models with many new features. Active improvement of software and hardware functionality leads to the fact that the battery life of the device is reduced. Large RAM, powerful processes, multi-inch touch screens and powerful cameras all contribute to the fact that batteries are discharged quite quickly. This is why it is important to have a reliable memory. It’s great if the original charger has been preserved, but what if it’s lost or broken? Then buying a new one raises the question of not only preserving the functionality of the phone, but also your own comfort.

Everyone has experienced their smartphone running out of power at the most inopportune moment. This is especially scary when there is sorely not enough time to recharge. At such moments, the first charger that comes to hand is grabbed, connected and the countdown begins. Sometimes the process happens quickly, and often it takes a treacherously long time. The result is sad - after some time there is no connection again. Today we’ll figure out how memory devices differ and how to make the right choice.

Charger type

Before purchasing, many people ask themselves which memory is better to choose: original, analog or universal? Many people buy the original, which means they do not worry about the compatibility of the device with gadgets, the speed and features of charging, as well as various risks (cheap chargers that are sold in tents in markets may well lead to strong heating of the battery). But it is not always possible to buy an original device, then a high-quality analogue will be the best option. It contains a list of compatible device models, as well as technical characteristics that are identical to those of the original.

Power connector

The memory can have different connectors:

The weakest link in the charger is the cable. If it is non-removable, then if it breaks, it is almost impossible to restore the functionality of the device. If it is removable, then the adapter itself, which is plugged into the network, can be used further by simply purchasing an additional wire.

When choosing a charger, it is better to give preference to proven brands. For questionable devices, the cable can reduce charging efficiency by up to 75%. And this is not only a loss of electricity, but also of your time. In addition, such cables can break or come off the connector, which ultimately remains in the device. This leads to a short circuit and failure of the device.

Fast charging

Some charger models have fast charging. She may be:

According to the developers of Quick Charge technology, battery charging can be accelerated by up to 75%. In the first few minutes, smartphones that are compatible with Quick Charge are charged for several hours of use. This is really convenient in the modern rhythm of life - you run into a cafe, plug in your gadget, drink a cup of coffee and leave with a phone with a decent battery charge.

The key difference between Quick Charge 3.0 technology and 2.0 is the presence of the INOV function or intelligent determination of the optimal voltage. Depending on the progress of the battery charge, the required current strength gradually decreases. This allows you to minimize wasted energy during recharging.

Using a special adapter with the Pump Express+ 2.0 function, you can fully charge your smartphone battery 1.5 times faster compared to a standard charger.

Price issue

Today, chargers are available in a wide price range. So, having spent:

From 65 to 300 rubles you can buy branded memory for devices of various brands (Sony Ericsson, Samsung, LG, Apple or Nokia). They can be without a wire, as well as with a removable or non-removable wire.

From 300 to 1000 rubles you can purchase universal chargers in a durable case with two USB connectors. They will become an indispensable companion when traveling and in everyday life.

for more than 1000 rubles you will receive reliable and practical chargers from leading brands. A number of models have the Quick Charge 2.0 or Quick Charge 3.0 fast charging function, in which the charging power is increased by voltage rather than current. Which is absolutely safe for the gadget, because... it does not overheat.

When ordering, expect it to cost $1.95. I will get honest 2 A, and even with 2 ports, of course, I didn’t. It appeared on BIC recently, there were no reviews at the time of ordering, I ordered it out of interest and, to a lesser extent, practical need. In general, according to first impressions, the charger is worthy of attention for its price; it produces about 1 A at load.

For giblets and details - please see cat.

Plug for our sockets. The charger can be ordered in black and white. I will review the white version. The Chinese, I have seen cases online with cheap chargers, have the habit of sometimes changing the filling depending on the color, so when ordering black, there is no guarantee that nothing will change in it. The intrigue has taken place, now let's move on to the review.

Technical characteristics declared by the manufacturer:

Model: ZY-1320
Input: AC 100-220V 50-60Hz
Output: 5V 2100mA

On board we have 2 USB ports, one of which proudly displays the inscription 2.1A For IPad, and the second - a modest 1.0A Others.


The italic font in the designation of amperes and the decimal point located vertically in the middle suggest trying the well-known proverb in its modified version - “don’t trust and verify.” What we, in fact, will do next.

Having taken it apart, we see 2 “pancakes” connected by a cable.

In the open position.




The parallel wiring on the board makes it clear that 2 USB ports, with beautiful inscriptions indicating different loads, are a banal Chinese trick and a habit of inflating the technical value of a device with the appropriate set of symbols.
In fact, connecting to one or a second USB port will not change anything; the power comes from one source.
By the way, the port called 1.0 A Others turned out to be not of very high quality and does not connect well, requiring movement in order to catch the charge. The second one is normal.

An improvised resistance of 5 Ohms made of nichrome will allow you to see the current-voltage under a load of 1 A (The tester wires are equipped with their own resistance, there are no complaints about high accuracy).

We see 0.85 A and a voltage of 5.06 V, measured by a locally known USB charger. In principle, this is normal.

So, the charger handled a 5 ohm load fine. Suitable for smartphones and more or less simple power banks.

We change the load resistance to 2.5 Ohms to obtain the declared 2 A.

And now, the semantic core, which is also a ruthless exposer of Chinese cheap inscriptions, is the result of the above-mentioned load!


FAIL. Of course, this was to be expected, remembering the price and design, but the peculiarity of the Russian soul in its secret corners, who knows more than the local inhabitants, always keeps faith in the existence of flash drives for 100,500 gigs for 2 rubles. So, the attempt could not fail.)

Charger Doctor has a lower voltage measurement limit of 3.5V, which was crossed by re-measuring the voltage with the tester.

Volt-ampere when charging Power Bank.

Power Bank charging mode:
I = 0.93 A
U = 5.08 V

The voltage is close to the optimal value, the current consumption is close to the maximum. From these characteristics we can conclude that the power is slightly less than 5 W.

During operation, with a consumption mode of 0.9A, the device does not overheat and, at first glance, does not think about switching to firecracker mode. If anything changes, I will add and change the review.

To summarize, the charger can be characterized as an interesting offer for its price, if you understand that you should not expect a multi-channel load from it with a total amperage of 3 A. This is a 1 A charger with 2 “marketing” USB ports. Although, on the other hand, the second one can be conditionally considered a spare. True, one of mine turned out to be buggy. I hope you have better luck.)

Thank you all for your attention!

update

Doping

The reviewed charger, judging by the diagram and the For iPad inscription, is positioned for use in Apple devices, which have a different charging principle from a computer than the rest of the majority.
For apple devices:

For the vast majority:

The jumper between data+ and data- makes it clear to most modern devices that they are connected to a source capable of delivering 1 A or more. If it is not there, then charging proceeds with a current of no more than 0.5 A, standard for USB 2.0 computer ports.
The wire under review contains resistors used in Apple circuits for recognizing an external power source.
For those who do not own Apple devices or who do not plan to charge them, it makes sense to make minor schematic changes to make the charger more versatile.
With the default scheme, the Lenovo smartphone took 0.46 A from the device, while the power bank from the information above consumed 2 times more. That is, the device worked at half capacity due to the fact that the consumer “did not know” about the available power.
The following changes need to be made to make charging universal: