External battery for phone: selection criteria and how to use. External Battery for Phone: Selection Criteria and How to Use How Sot Phone Power Block Diagram

Modern mobile devices and all kinds of gadgets are equipped with a variety of fashionable and useful features and applications. Yes, and the most difficult mobile games amazed graphics and opportunities. It is thanks to such applications that any smartphone "sits" almost during the day. Therefore, you need to learn to choose more powerful for your phone. Or choose additional

The main reasons for which you just need to choose a new charging

So the phone began to quickly and quickly discharge. To begin with, it is necessary to determine the main reason, and only then look for the most optimal ways to solve the problem. So what can be the causes of early discharge?

If a smartphone or tablet is new, the instruction claims a certain duration of work, and in fact, the device works several times less, then the reason can be a reason in the settings. As a rule, on the phone itself you can adjust the brightness and consumption of energy or disable multiple applications that pull the charge.

Another thing, if the smartphone is configured, for a long time He worked quite normally, but over time began to discharge much faster. Here, most likely, the internal charger or an external phone battery is guilty. The only solution is to replace the element. To do this, you can use both branded battery and a universal analogue.

Types of external batteries

Despite the entire prevalence of cell phones and smartphones, in the world so far there are only three main types of batteries:

Lithium-ion. This is perhaps the most common external battery for charging the phone. It has a more optimal ratio of durability, safety and energy intensity than other analogues. Also, such elements are endowed with a special "effect of memory" and are quite slowly discharged. But they are rapidly aging, and even in case of permanent operation.
Nickel Cadmium. They are recognized as harmful and were laid on the shelf. Applied only in the very first phones due to low cost. In addition, the higher there was their energy intensity, the higher the physical size.
Lithium polymer. These are more reduced and improved external batteries for cell phones. Therefore, such elements took over all the positive aspects of the initial sample, and also became more environmentally safe.

Features of work and operation

Mobile phone is a rather complicated and gentle mechanism. And each of his element has its own features and requires certain operating conditions, including the battery itself. Therefore, there are several rules, which can be significantly extended by the time of the telephone battery:

When used, it is required to strictly comply with the rules of operation defined by the manufacturer, i.e. do not overheat, do not wet and not percade.
Try to avoid physical damage element.
External does not endure frequent blows and falls.
It should not open the batteries on their own.
Replacing and recharge the battery should be solely when the device is turned off.
It is not recommended to constantly charge the gadget for a long time (more than a day).
The larger and more often the battery is used, the better.

Mobile Battery Myths

For all the existence, mobile phones have practically overgrown with various fiction and legends that scare naive users. Several of them relate to the most important details.

Parameters for which you should pay attention to when selecting charger

When choosing an additional external battery for the phone, many factors should be taken into account (in addition to the manufacturer and quality of materials). As a rule, experts allocate several basic parameters for which these elements differ. Therefore, knowing these features, you can choose the appropriate option.

The capacity of the accumulated battery. From it directly depends on the functioning time without additional recharging. As a rule, it is enough 4000-6000 m / h.
Tok Power. If the battery is used to power not only the smartphone, then you need to select a device with force 1-3 A. For a regular phone, there is enough apparatus issuing 1 A.
Charging method. It is better to choose a gadget that can eat immediately from several sources: an ordinary power grid and via a USB connector.
Battery indicator. This item is simply necessary in the daily operation of smartphones and phones. There are several charge display options: using color changes or numbers. The numeric indicator is much more accurate informs about the state of the battery, but it is much more expensive.
Number of ports used. Processing and prudent users choose copies with their largest numbers. But, as a rule, the need to charge several devices simultaneously occurs quite rarely. Therefore, enough 2-3 ports.

Several features to pay attention to when choosing batteries

In addition to the basic parameters to which special attention must be paid, there are several additional qualities. It is they who can greatly facilitate and extend the operation of the presented gadgets.

It is best to choose an external battery for a phone where the power button will not stand out on the background of the case. After all, if you press it by chance, you can get pretty an unpleasant surprise. We use a special lantern in the device to make it easier to find in the dark.

In order to protect the valuable thing from entering all sorts of dust or water, as well as to protect against small beats, you must choose devices with a special case. Such devices will cost somewhat more expensive, but their life will be explicitly longer.

Lovers of modern innovative technologies will appreciate the presence of features such as Wi-Fi and NAS Server. With the help of them, it is possible not only to unhindered to use and distribute the Internet, but also to save various data on a special memory card.

It is useful to any battery and after all, in summer we are not always near a source of nutrition.

To purchase a high-quality battery, which will last long enough, you should approach this issue with all seriousness. Before making the final choice, you need to familiarize yourself with the most common options, compare the characteristics and reviews. And only then can I buy for the phone.

First of all, this device should be quite comfortable, easy and compact to fit freely in any bag.
The charging of the same company as the main device will suit much better than such analogues. In addition, thus you can protect yourself from poor quality goods.
It is better to clarify in advance whether the purchase is possible, and under what conditions. The charger may simply be trite not to approach.

Comparison of the most common external batteries

There are many external telephone batteries. They are probably as much as the mobile devices themselves. In this case, each selects its external battery for the phone. Reviews - this is what attention is drawn first. Therefore, here are some subjective opinions about the most popular models:

Vampire Mini. There is a standard USB connector. It is convenient to adjust the current and voltage. Among the shortcomings are low efficiency.
Raising stabilizer. This battery charges almost all known mobile devices, and also charges from any power source. The only drawback is required by an external battery pack.
Specialized Specialized Solder "Plagty". Universal battery. It has many special connectors for all types of devices, as well as in it you can easily replace the internal batteries. Minus - in the absence of adapters.

Universal external battery

As worldwide all-knowing statistics shows, almost every urban resident has two or more mobile devices, as well as a laptop and several other gadgets. Therefore, many seek to acquire a universal external battery for the phone, but so that it comes to the rest of the devices.

A similar choice allows you to kill several "hares" at once: the ability to charge all available gadgets from one device, saving money and place. At the same time, the operating rules for such devices are the same as for narrow-controlled batteries. In addition, modern shops can offer great amount Different prices, characteristics and quality of batteries. Therefore, this is the most optimal choice for any user.

An additional power supply for the smartphone is optional to buy. If desired and certain abilities, you can easily make a homemade external battery for your phone.

The most common homemakes are charging from the batteries and from the sun. Each of them has its own characteristics. In the first case, a resistor, a suitable plug, 4 batteries and a special box for them are required. The principle of operation is simple - the resistor connects the nutrient elements with the plug and transfers the charge on mobile device. The minus is that the batteries are required to constantly change.

In the case of solar recharging, you can simply buy special lanterns charged from the sun, and take the necessary items from there. Next, the circuit connects through the diode, and the design is refilled into some box.

Now all manufacturers of cell phones have already agreed and everything that is in stores is charged via a USB connector. It is very good, because the chargers have become universal. In principle, the charger for cell phone Such is not.

This is just pulse source direct current 5V voltage, and the actual charger, that is, the scheme follows the charge of the battery, and ensures its charge is in the cell phone itself. But, the essence is not in this, but in the fact that these "charging devices" are now sold everywhere and are so cheap, that the issue with repair disappears somehow by itself.

For example, in the store "Charging" costs from 200 rubles, and on the famous alikexpress there are offers and from 60 rubles (including delivery).

Schematic scheme

Scheme typical chinese charging, drawn from the board, is shown in Fig. 1. There may be a variant with the permutation of VD1, VD3 diodes and VD4 stabilodon on a negative chain - Fig.2.

And more "advanced" options can be rectifying bridges at the inlet and outlet. There may be differences in the nominal details. By the way, the numbering in the schemes is given arbitrarily. But the essence of the matter does not change.

Fig. 1. Typical scheme of the Chinese network charger for cell phone.

Despite the simplicity, it is still not bad pulse block Nutrition, and even stabilized, which is quite good and for powering something else, except for a cell phone charger.

Fig. 2. Scheme of a network charger for a cell phone with a changed position of the diode and stabilion.

The scheme is made on the basis of a high-voltage block generator, the latitude of the generation pulses of which is adjusted using the optocoupler, the LED of which receives the voltage from the secondary rectifier. Optopara lowers the offset voltage on the basis of the key transistor VT1, which is set by resistors R1 and R2.

The load of the transistor VT1 serves primary winding transformer T1. The secondary, downward, is the winding 2, with which the output voltage is removed. Still have a winding 3, it serves to create a positive feedback For generation, and as for a negative voltage source, which is made on the VD2 diode and C3 condenser.

This negative voltage source is needed to reduce voltage based on the transistor VT1 when the U1 optocouple opens. An element of stabilization determining the output voltage is the VD4 stabilion.

Its stabilization voltage is such that in the amount with direct voltage of the IR LED, the optocouplers U1 gives exactly the most necessary 5V, which are required. As soon as the voltage on C4 exceeds 5V, the VD4 stabilitron opens and current through the optocouples LED through it.

And so, the work of the device of questions does not cause. But what to do if I need not 5V, but, for example, 9v or even 12v? The question arose together with the desire to organize a power supply unit for a multimeter. As you know, popular in amateur circles, multimeters are powered by "crowns", - compact battery with voltage 9V.

And in the "hiking" conditions, this is quite convenient, but in domestic or laboratory, I would like nutrition from the mains. According to the scheme, "charging" from the cell phone in principle is suitable, it has a transformer, and the secondary chain does not contact with the power grid. The problem is only in supply voltage, the "charging" gives 5V, and the multimeter needs 9V.

In fact, the problem with an increase in the output voltage is solved very simply. You just need to replace the VD4 stabilitron. To get a voltage suitable for powering a multimeter, you need to put a stabilion to a standard voltage of 7.5V or 8.2V. At the same time, the output voltage will, in the first case, about 8.6V, and in the second about 9, sv, that, both, and the other is quite suitable for the multimeter. Stabilirt, for example, 1N4737 (this is 7.5V) or 1N4738 (this is 8.2V).

However, you can and another low-power stabilion on this voltage.

Tests showed good work Multimeter with diet from such a power source. In addition, an old pocket radio receiver was also tried from "Crowns", - worked, only interference from the power supply slightly interfered. Voltage in the 9V case is not completely limited.

Fig. 3. Voltage adjustment node for alteration of the Chinese charger.

Want 12V? - Not a problem! We put Stabilitron at 11V, for example, 1N4741. Only you need C4 capacitor to replace the highest voltage, at least 16V. You can get even more tension. If at all to remove the stabilion will be constant pressure About 20V, but it will not be stabilized.

You can even make an adjustable power supply, if the stabilion is replaced by an adjustable stabilion, such as TL431 (Fig. 3). The output voltage can be adjusted, in this case, the R4 variable resistor.

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Anyone, at least once in his life, came across not in time the discharged battery urgently necessary electronic deviceAnd many of us such a nuisance overtakes regularly.

The way to solve the problem is simple - it is worth only to get a compact external battery, to recharge it in a timely manner and not forget at home, going on business. We offer you the ranking of the best external batteries 2018 - the first half of 2019, compiled according to expert reviews and ordinary customers. Just do not forget - to choose the best external battery, you need to really appreciate your needs and choose the optimal container device. In the first approximation, its value must be twice as high as the corresponding gadget battery indicator, which is expected to be most often charged.

Capacity external battery - what it means

Pointing for its external batteries passport containers, manufacturers write the truth, but not all. For example, those 13,000 mA · h, declared for CANYON CNE-CPB130, its built-in battery really has. Only here to fully charge the smartphone with a battery with a 4,000 mA · h turn out to be only twice. The fact is that under the nominal capacity here is meant a stock of the energy accumulated by the battery of the device during its operating voltage. In this case, it is approximately equal to 3.7 volts, which is noticeably below the value defined by the USB specification. And at all, the mobile technique is accounted for by means of this interface, the internal voltage is converted to standard 5 V with a proportional decrease in the available capacity. In addition, part of the energy is spent on the work of the appropriate electronic circuit. For reference: Currently, lithium-ion (3.6-3.7 V) or lithium-polymer (3.85 V) batteries are used in external batteries, and the efficiency of the transducers is in the range from 0.9 to 0.95.

Thus, knowing the "capacity" of the battery packs and the smartphone, it is easy to calculate how many times you can charge the first device the second. To do this, the passport value of the external battery capacity must be multiplied by work voltage His own battery (if the type is unknown, we accept 3.6 V), divided by 5 volts uSB interface, and the result is multiplied by the efficiency (laid by 0.9). As a result, we obtain the useful tank of the device, which can be used when charging.

Completing our example, we have (13000 * 3.7 / 5) * 0.9 \u003d 8658 mA · h, which is enough for two full charges, Say, Xiaomi Redmi 4X with its battery for 4 100 mAh. And a little bit will remain "about the supply."

Welcome radio amateurs !!!
Riding old boards came across a couple of pulse power supplies from mobile phones And I wanted to restore them and at the same time tell you about the most frequent damage and troubleshooting. The photo shows two universal schemes Such charging that most often meet:

In my case, the board was similar to the first scheme, but without a LED at the output, which plays only the role of the voltage presence indicator at the outlet of the block. First of all, you need to deal with the breakdown, below in the photo I'm out of question what the most often fails:

And check all the necessary parts using the usual multimeter DT9208A.
It has everything you need for this. The mode of sounds of diodes and transition transitions, as well as an ohmmeter and a meter of capacitor capacitance to 200μF. This set of functions is more than enough.

During the test of radio components, you need to know the base of all parts of transistors and diodes especially.