Charging a frog how to use where a plus. Why the "frog" is a universal battery charger

29.04.2021

System

Batteries with more than two contacts can be charged using the described device, however, for this it will be necessary to disassemble the battery and connect charging to it, bypassing the controller.

Following from all of the above, it can be understood that the "Frog" is a universal Charger, which is very useful in case of failure of other power sources, small batteries, as well as the inability to charge gadgets in the usual way, which happens quite often. At the moment, manufacturers offer all new devices equipped with a USB port and an LCD display, which greatly simplifies their use.

Device advantages:

The presence of a USB port that allows you to charge most devices.
Ease of use.
Versatility.

Disadvantages:

With frequent use, relative fragility.
Long process of charging capacious batteries.

"Frog" - the best option for a spare energy source

Despite a few shortcomings, the “Frog” is a charger, the price of which is very diverse (from 60 to 650 rubles), it is quite a useful thing in the household, if only because it is able to literally revive batteries of phones and cameras that show no signs of life . But it should be borne in mind that you need to use this device as needed. Too frequent charging using the "Frog" can lead to rapid depletion of the battery and, accordingly, its failure. Paradoxical, but true.

Despite the fact that these chargers are mainly made in China, you should not neglect such products. On the modern market, you can find universal and unique auxiliary devices that can greatly facilitate our lives and give a second chance to details that would otherwise fly into the trash. Therefore, it makes sense to have at least some idea of how to use the Frog device for the usual recharging of a telephone battery.

Modern technology amazes and impresses with its diversity. So, for example, there are many varieties of devices for charging various devices. In our article we will talk about such chargers, which are colloquially called "frogs". The frog is very simple and easy to use. It plugs into a regular outlet at 220 volts.

Frog is a universal charger that fits all batteries of any mobile phones. The frog is also good for other lithium batteries, for example, from cameras, PDAs and other small-sized equipment.

The charger is a small box that looks like a frog with a plug for an outlet. Two antennae go from the case - for connection and for charging.

There is nothing complicated about how to charge the battery with a frog. To recharge your phone using this device, you need to perform a few not very complicated steps.

How to charge a frog: instructions

If you have studied this device, read the attached instructions on how to charge your phone with a frog, then you probably know that you first need to remove the battery from the phone, but before that you must turn it off.
Next, click on the clothespin on the frog. This is necessary in order for the device to open.
Now try to insert the battery into the device so that the two terminals match. If your charger has four terminals, then you need to use the two that are located on the side.
Then press the TE button (usually on the left). If the CON LED lights up green, this indicates that you managed to connect everything correctly. If it does not light up, then try to connect the terminals again.
Now, if you have already checked the correct connection, and the CON LED does not light up, it may well be that the battery has been completely discharged, which is called “to zero”. In this case, your battery charger should be plugged into the network for about five minutes. After that, check if the CON indicator we need now lights up. Lighted up - it means everything is in order. If nothing happened again, check if there is voltage in the network, as well as the health of the battery itself.
Now plug it in. Is the CH indicator lit or flashing? If yes, then all is well.
The battery will be charged when the left FUL indicator on the charger lights up.

As you can see, there is nothing particularly complicated in this matter. Now you know how to charge through a frog.

If you lose your native charger from a mobile phone or smartphone, inexpensive universal chargers for 3.7 volt lithium batteries come to the rescue, the so-called frogs(or toads). They have adjustable contacts, which are directly connected to the battery, previously pulled out of the phone. Of course, this creates some inconvenience (you need to constantly remove the cover, time gets lost), but sometimes this is the only way out when charging from a rare Chinese phone is lost.

Instructions for using the charger

Charger "frog" is designed to charge Li-Ion batteries that are used in cell phones, GPS receivers and cameras. It works from a network of 110-220 V. The output voltage is 4.2 volts, the current is 200 mA. The charge occurs automatically and is controlled by a microcircuit, and it automatically turns off when the required level is reached. Standard charge time is 1.5 hours.

It is necessary to clamp the battery into the frog so that the charger contacts are on the + and - terminals of the battery. If the battery has 3 or 4 contacts, you usually need to use 2 extreme ones. If the polarity of the connection is correct, then when the button is pressed TE(left) the first green LED will light up CON. If not lit, press the right button CO(polarity reversal) and press the first button again. On some frogs CON can burn when connected without pressing the button - also the correct polarity. There are also already models that automatically determine the polarity. Accordingly, there is no right polarity reversal button.

If everything is fine - CON lights up green, plug into a 220V socket. lights up PW and starts to burn or flash CH(charge - charge). When the charge is completed, the right LED lights up. FUL(full - full). If a CON does not light up at all, the battery may have sat down to zero. Then connect arbitrarily in any polarity and plug it into the network for 5 minutes (not for long - it's not scary). If a CH will blink, then the charge is on and everything is correct, otherwise change the polarity with the right button and see how it will behave then CH. If it burns right away PW and FUL then most likely the battery in the frog does not contact (so the LED lights up without a battery at all) - move it to the contacts.

Repair manual memory "frog"

As for a completely inoperative memory - here just look for a burnt part. But sometimes low-quality chargers come across when, when connected to the “frog” of the battery, the charge current is less than the specified one. Not 200 ± 50 mA, but several times less. Thus, the battery is simply undercharged. With a decrease in the charging current at the output, the final voltage on a “fully charged” battery also decreases. Hence the low battery life when installed in the phone. When the light signaling of the charger signaled the end of the charge, the voltage on the battery was only 3.9V. Why is this happening? Most likely it's a matter of parameter spread. A slight deviation in the values of the resistors entails a change in the overall characteristics of the device.

Schematic diagram of the memory frog

By replacing the fixed resistors R14 and R15 (the numbering of parts on the diagram corresponds to the numbering of parts on the printed circuit board) with a multi-turn trimmer brand SP3-39A with a nominal value of 10 kΩ, it becomes possible to accurately set the output current. After the replacement, I set the current to 250 mA, which roughly corresponds to the specified parameter on the charger case. You can, of course, set the charging current with a trimmer at will and another. When the light signaling of the device turns on, notifying about the end of the charge, the charging current decreases to 70 mA, and the voltage on the battery is set within 4.15V. The process of full charging lasts about two hours, that is, as well as when charging in the device with a native charger. Download the full version of the manual on the forum.

homemade frog

After analyzing several circuits of the Frog's memory, I settled on one of them. I decided to make it as a prefix for charging NOKIA (I think many people have them, and I have a few lying around) to charge the Li-ion battery 18650 . In the charger itself from NOKIA, the output from the transformer is almost 7V, which should be enough for the set-top box.

For the battery itself, you will need a battery compartment to mount it on the side of the case. On the cover - an output of four LEDs and a micro-toggle switch. In the meantime, a seal has been developed for the circuit on CMD and simple radio elements, with installation on top of the board. Download it.

The seal that is attached is already mirrored, send it to print immediately. The photo shows just the arrangement of the elements, as it should be.

Then I soldered a separate memory card, tested it - it works great! With the specified details, the output of the charger is 4.2V. I put the used battery on charge - the charge rises. The LM358 chip was installed soldered, taken out of nowhere. PSU used with an output of 6V 0.45A.

Schematic diagram drawn and tested - Igoran.

Discuss the article CHARGER FROG

How to use the "frog" charger. Universal charger "frog" ("frog") is designed to charge lithium Li-Ion batteries with a capacity of up to 2000 mAh and voltages from 3.5 to 4.8 V, which are used in most cell phones, PDAs, GPS receivers and cameras.
Works from a network of 110-220 Volts. Output voltage - 4.25 volts, current 200 mA.
The charge is automatic and controlled by a microchip. The charge is automatically turned off when the required level is reached. The standard charge cycle (time) is 1.5 hours.
It is necessary to clamp the battery into the frog so that the charger contacts are on the + and - terminals of the battery. If the battery has 3 or 4 contacts, 2 extreme contacts are usually used.
If the connection polarity is correct, pressing the TE (left) button will light up the first green LED CON. If it is not lit, press the right CO button (polarity reversal) and repeat pressing the first button. On some frogs, CON may light up when connected without pressing the button - also the correct polarity. There are also already models that determine the polarity themselves. Accordingly, there is no right polarity reversal button.

If everything is fine - CON lights up green - plug it into the outlet. PW (power - network) lights up and CH (charge - charge) starts to burn or blink. At the end of the charge, the right LED FUL (full - full) lights up.

If CON does not light up at all, the battery is probably dead. Then connect arbitrarily in any polarity and plug it into the network for 5 minutes (not for long - it's not scary). If CH (charge - charge) flashes, then the charge is on and everything is correct, otherwise, change the polarity with the right button and see how CH will behave then.

If PW (mains) and FUL (fully charged) immediately light up, then most likely the battery in the frog does not contact (it burns without a battery at all) - move it to the contacts.

Sometimes, with a faulty battery (if one cell dies), the frog can show a full FUL charge even if it is far from normal voltage. It's just that the charge current no longer flows - that's all.

If a cell phone with a dead battery does not turn on for charging, does not show signs of life at all, then read below.

I must say that if a battery with a nominal voltage of 3.6 volts sits below 3.2 volts, then the mobile phone may not show signs of life at all, even when a standard charger is connected. That is, the controller sees that there is no battery at all and does not turn on the charge. In this case, the frog is an irreplaceable thing - by turning on the battery for 5 minutes through the frog - you give a boost to the battery charge, after which it can already be charged in the phone itself.

An additional 3rd contact on the battery is usually a signal from a controller chip (or simply a thermistor), which are located inside the battery itself and do not allow overcharging and overheating - they give a signal to the charger (cell phone) to limit the current or turn off the charge altogether. The frog does not have such control and charging it is considered worse than the charger that came with your device, so you should not leave the frog unattended for a long time, especially if your battery heats up while charging.

Happy charging!

The recently appeared charger, popularly called the "frog", thanks to versatility has become very popular. It can charge the batteries of almost all mobile devices: phones, tablets, PDAs, cameras, camcorders. The main condition is that the batteries must be lithium, others will be disabled.

In contact with

Advantages of Charging Frog

These include:

Kinds

Standard models are designed for connections to household sockets with a voltage of 220 V. 12-volt varieties are available for use in cars. For the operation of a charger equipped with a cord with a USB connector for connecting to a PC, 5 V is enough. In addition, they are divided into automatic, which independently establish the correct polarity of the connection, and semi-automatic, on which this is done manually with the TE button.

The charging process is monitored using indicators placed on the case:

FULL lights up after the battery is fully charged;
CHARGE signals that the process has started and is proceeding normally;
POWER indicates the presence of a connection to a power source;
CON with a green glow indicates the correct connection of the battery, with a red color it is necessary to change the polarity with the TE button.

Charging rules

Using the frog to charge batteries is simple. To do this, you need to perform the following sequence of actions:

If the CON does not light up when the battery is connected, it is likely that the battery is discharged to the limit and needs to be pushed. To do this, connect the device to the outlet and wait a few minutes. With correct polarity CHARGE lights up, if not, then you should change the poles and start charging. It happens that when connected to a power outlet, POWER and FULL light up at the same time. This is due to poor contact between the terminals of the device and the battery. You just need to reinstall the battery. If the FULL indicator lights up immediately when connected to a power outlet, it means that the battery has worked as long as it should. Will have to buy a replacement. Fast charging (5 - 10 minutes) means that the phone's battery won't last long.

Self-made charging frog

Make a full-fledged universal frog charger from scratch with your own hands non-professional will be difficult. If you can’t buy it, then many will be able to convert an old mobile phone charger into a frog. For work, a piece of sheet plastic, a spring from a clothespin, 2 paper clips, and wire are enough.

The technical devices of the new generation amaze with their diversity. For example, have you ever thought that there are so many cords for charging various devices that there are not enough fingers to count? And each device needs only its own charge. But there are also universal chargers that can charge any piece of equipment, be it a phone or a camera. This article will consider the universal charging "frog".

"Frog", but not an amphibian

A frog is not only a useful animal, but also a colloquial name for a charger. It is very simple and convenient to use. Operates at the expense of an electric power source with a voltage of 220 volts.

Benefits of clip-on chargers

Charging "frog" has the following advantages:

Versatility. The type of charger in question is suitable for all batteries mobile phones, cameras, camcorders, PDAs, an MP3 player and other small-sized equipment that operates through the use of a lithium battery.

Ease of operation. To use charging, no additional knowledge, skills and experience are needed. However, before using the "frog" to charge the battery, you need to navigate the markings and clearly understand which indicator is talking about what. Read more about labeling below.
Ease of use. The "frog" for charging batteries is suitable for use wherever you need it. The main condition is the presence of an outlet.
Compactness. The overall characteristics of the charger are minimal, which allows you to carry it with you in a backpack, bag or even a pocket.

What is a "frog"?

Charging "frog" outwardly looks like a small box, which in its shape resembles a frog, with an attached plug for an outlet. On the case there are two contacts in the form of antennae, designed to connect and charge lithium batteries. A feature of the device, which provides it with versatility, is that the contacts are movable. That is why you can charge batteries of various configurations.

Types of "frogs"

Depending on the type of connection, “frog” charging happens:

connected to a USB cord, and then to a PC - five-volt;
automobile - twelve-volt;
working from a standard socket - 220-volt.

The classic option is a "frog" for charging batteries, designed for a voltage of 220 volts. On the reverse side of the cover of the device there are two sliding pins, which are parallel to each other. They must be separated by a distance that corresponds to the distance between the contact areas of the lithium battery.

Universal charging "frog" has a polarity of "+" and "-". Depending on the model of the charging-clothespin, it is adjusted either in automatic mode, or manually by pressing special buttons.

Deciphering the marking

On the case, the charging “frog” is marked. Ignorance of the designations excludes the possibility of the correct operation of the charge as a whole.

"TE" - connection health indicator.

"CON" - the LED is active in case correct connection battery by pressing "TE".

"PW" - indicates the presence of a network connection. Can become active when the battery is fully charged.

"CH" - is in a flashing state throughout the entire time when the battery is being charged.

"FUL" indicates that the battery is fully charged.

"CO" - indicates that "+" and "-" are mixed up.

Charging "frog": how to use?

Using the frog charger is nothing complicated and supernatural, however, in order to ensure its proper and efficient functioning, it is necessary to follow the operating instructions.

How to use the "frog" to charge the battery? Step-by-step instruction is given below:

1. Turn off mobile device and remove the battery from it.

2. Open the "frog" charging by pressing the clothespin.

3. Insert the battery into the "frog" so that the two terminals match. In the case when the charging device is equipped with four terminals, two side terminals are used.

4. Press the "TE" button. As a rule, it is located on the left side of the charger.

5. Check the correct connection by looking at the corresponding indicator ("CON"). It should be noted that the indicator LED may not light up not only as a result of incorrect connection of the terminals, but also due to the fact that the battery is completely discharged. If the latter option takes place, then the "frog" for charging the phone and the battery of the device are connected for about 5-7 minutes to an electrical power source - an outlet.

6. Connect to the network. Accompanied by an active "CH" indicator.

7. Disconnect the terminals after the "FUL" indicator, which is on the left, lights up.

How to check if it works

There is a verification algorithm that will help make sure that the “frog” charging is working properly. Let's see how to use it.

The key to the correct functioning of the device is the correct polarity. To check it, you must click on the button located on the left. If the lights near the "CON" and "FUL" indicators light up, the connection to the terminals is correct. Inactive indicators indicate a connection error. In this case, click on the button on the right.

Be extremely careful, because the indicator lights may not light up not only for the above reason. For example, the tablet battery will move and the pins of the clothespin will not come into contact with the pads.

If the test was successful and everything that is needed blinked, then the "frog" for charging the battery is safely connected to the outlet. “PW” and “CH” should light up. Upon completion of the charging process, the LED next to the "FUL" indicator is activated.

The total time required to fully charge the battery of a phone, camera, player, set-top box or other device from the world of technology depends on the battery capacity. On average - from 2 to 5 hours. At the same time, if it takes, say, 3 hours to fully charge the battery of your device, and the “frog” was connected to the network, for example, 5 hours, there is no reason to worry: the clothespin charger automatically stops charging the battery when the last maximum possible charge level is reached .

Do it yourself!

Making a “frog” exercise with your own hands from scratch is quite difficult and problematic, and for many it is not at all possible. But to remake from a non-universal old-style charger is quite realistic.

First, let's decide what fixtures, materials and tools should be at hand.

Source materials:

an old charger designed to charge just one model of a removable battery;
a piece of plastic;
spring from a regular clothespin;
two paper clips;
wire.

Tools:

pliers;
hacksaw;
stationery knife;
drill;
drill;
glue "Moment".

Work technology:

Voila! Miracle device done!

Such a "frog" is suitable for charging the phone of absolutely any brand, model and modification.

If the light shows any signs of damage, you must make sure it is not leaking. Lights will be almost maintenance-free if relative care is taken. The Velcro must be kept clean and free of foreign objects to ensure a good connection every time.

If necessary, wipe the light with a damp cloth to remove excessive buildup of salt particles or dirt. The Frog Light has been provided with enough Velcro to attach to your boat. The light should be installed at a point on the bow or stern canvas where the light does not affect the vision of the rowers while still illuminating as much of the boat as possible.

Frog is a universal charger that fits all batteries of any mobile phones. The frog is also good for other lithium batteries, for example, from cameras, PDAs and other small-sized equipment.

The charger is a small box that looks like a frog with a plug for an outlet. Two antennae go from the case - for connection and for charging.

The shape of the "canvas" in each class of boat, each boat shape and each boat manufacturer will be different and therefore the most practical location to meet the above recommendations should be determined prior to boarding. This navigation light was made specifically for fishing conditions. The Frog Light has been tested for leaks prior to delivery, however the Frog Light cannot be submerged in water and is not guaranteed against water damage. So please make sure you check your lights regularly for internal moisture and if you find any evidence of water inside your Frog Light you should return it to Crocker Estuaries promptly.

There is nothing complicated about how to charge the battery with a frog. To recharge your phone using this device, you need to perform a few not very complicated steps.

How to charge a frog: instructions

If you have studied this device, read the attached instructions on how to charge your phone with a frog, then you probably know that you first need to remove the battery from the phone, but before that you must turn it off.
Next, click on the clothespin on the frog. This is necessary in order for the device to open.
Now try to insert the battery into the device so that the two terminals match. If your charger has four terminals, then you need to use the two that are located on the side.
Then press the TE button (usually on the left). If the CON LED lights up green, this indicates that you managed to connect everything correctly. If it does not light up, then try to connect the terminals again.
Now, if you have already checked the correct connection, and the CON LED does not light up, it may well be that the battery has been completely discharged, which is called “to zero”. In this case, your battery charger should be plugged into the network for about five minutes. After that, check if the CON indicator we need now lights up. Lighted up - it means everything is in order. If nothing happened again, check if there is voltage in the network, as well as the health of the battery itself.
Now plug it in. Is the CH indicator lit or flashing? If yes, then all is well.
The battery will be charged when the left FUL indicator on the charger lights up.

As you can see, there is nothing particularly complicated in this matter. Now you know how to charge through a frog.

The development of an electronic design or robotic prototype involves the integration of several elements that will give shape to our end system that when it is turned on, it will have to perform certain actions for which it was created. An important role is played by the energy source that feeds the system.

It has the ability to store high energy densities due to its chemical constituent, lithium ion polymer or commonly known as lithium polymer. This allows them to increase autonomy during their work at low load. What a miracle! Number of cells and configuration.

We have already talked about universal chargers for Li-Ion batteries of the "frog" type. Since progress does not stand still, such chargers also evolve, acquiring new qualities.

Today we will take a closer look at another representative of the amphibian tribe, the subspecies "fancy frog". And so that the interest is not only purely academic, I inform you that this charger can actually be bought in an online store - universal charger "Frog" .

The cell may also be a battery in itself. Each cell has a voltage of 7V. If more cells are connected in series, more voltage will be obtained. By placing more cells individual individual voltages of each cell are added together.

If the case were something like the following. In a practical example: while the battery has more power, it is possible to move large motors to give an example. It is important to note that just because a battery has more power, it does not mean that it will supply power for a longer period of time.

So. The Chinese company Sivva, representing http://www.sivva.ru/ in Russia, presents a "frog" inside which has its own buffer Li-Ion battery with a capacity of about 1000 mAh. This is approximately one charge of a simple cell phone.

This creation comes blister packed and looks like this.

The cell voltage in the battery is 7V, as we have already said. When the battery is used, as a consequence, it will be discharged. Recommended chargers. There are also some accessories that help a lot to ensure that our battery is always well charged and balanced, even when it feeds our systems. These devices plug directly into the battery charging port and display or LED displays the battery charge status.

Upload speed or download speed

If the condition is low, a warning tone will sound. How to measure the battery capacity or find out its capacity? Capacity is proportional to size and weight. Therefore, it is advisable that you evaluate the requirements of your design or prototype to take a good look at this factor. Speed and download speed are also an important fact. This is very easy to understand if we have the above data well identified. Well, this is a very good energy supply, no doubt! Some batteries may indicate the download rate in burst or discharge burst.

Fig.1. View of the packaging from the back and abdomen.

They are inside.

Fig.2. Equipment.

From left to right.

Adapter for connecting adapters to the frog.
- Charger frog with built-in battery.
- AC adapter with USB output.
- Wire for connecting the frog to the USB port for charging.
- Adapters for cell phones (5pcs) and USB-mother.

Discharge peaks are time limited. This means that the battery will offer the maximum maximum current for the minimum period of time. Usually this time goes from 10 to 30 seconds. This may continue, for obvious reasons, until the battery is completely discharged. But we must remember that our battery must not be dead.

This helps a lot, for example, when the motor starts up, maybe the motor can draw up to 170 amps only at start up, and after start up, the current consumption stabilizes with a draw factor of 20 A, for example. First of all, to charge the battery, and above all safety standards: watch the battery while charging.

What can this charger do?

1. Charge the Li-Ion battery connected to it with an operating voltage of 3.7V.

2. Charge cell phones or other consumers that can be powered from the computer's USB port, i.e. has a converter with a voltage of about 5V at the output (measured 5.5V without load, which is better than exactly 5V).

3. Charge yourself, either from a 220V network through a network adapter that comes with the kit, or from any USB port capable of delivering current up to 0.5A.

Here are some tips for safely charging your batteries. It is important that you allow time to monitor your battery charge. Check the battery regularly if it does not get hot or starts to swell. In this case, immediately stop the load. This allows you to significantly increase the battery charge. Here we assume it is 1C charge or less as this ensures that the battery chemistry is balanced by slow charging and thus ensures long battery life. Carefully configure the charger with cells and battery type. To really match the battery, you will be charged.

Here this link is for you to know and identify.
Monitor the battery while charging.

That is why we recommend loading the load via this type of charger.

Moreover, charging an external battery or cell phone can be performed simultaneously with charging the built-in battery.
I note that network adapter frog is very small, with retractable contacts, which allows you to always carry it with you. In size, it is slightly larger than the alarm keychain.

Let's see how this miracle, or, as it is now fashionable to say - a miracle, works. A cell phone battery was used as a guinea pig.

Was this information helpful? Share it so that more people know, but in general, consider these important security factors for looking after their personal integrity. Click here for more information. Many of us have repeatedly encountered the problem of charging a cell phone battery during any trip. Often, he walks down the road, we just forget to look at the phone screen and make sure the battery is charged. And just like that, it turns out that it's impossible to make an important call because the phone is about to shut down.

Fig.3. Charging an external battery in a clothespin.

We connect.

By the way, the polarity of the connected battery, the charger determines itself, which is convenient. But this feature is now available on almost all similar devices.

I note right away that the elastic contacts of the frog, in the absence of a rechargeable battery, abut against the case and deform, which then leads to a not very reliable fixation of the rechargeable battery. And the clothespin itself clamps the battery not securely enough. But this is already nit-picking.

Accordingly, the possibility of using a conventional charger included with the phone is also missing. But you never know what other situations in life might be. But for mobile phones, and more specifically, for the constant availability of the phone, most of us are so used to not feeling very uncomfortable, although this attitude is not at all necessary for a certain period of time. Well, if in such situations the “victim” is constantly available, for example, the on-board network of the vehicle.

Every time they have come across such a moment in their lives, waiting for a very important call, and at the decisive moment, the phone is switched off. And so I didn't need to charge phone prices for cell phone chargers more often. The charger is designed to charge the battery of any mobile phone battery or car battery. There are several types of mobile phone chargers. All loaders are divided into three main types. The simplest of them are considered non-automatic, usually batteries power transformers AC power are applied by a portable shower charger.

So. The blue light came on (see Fig. 3), the process started. And he went, I must say, very cheerfully - the charging current is almost 0.5A, despite the fact that the battery is already almost charged. Not bad, it will charge quickly.

I measure the voltage at the battery terminals - 4.2V. Alright, let's wait.

When measuring the voltage, I notice that it already exceeds 4.2V (and the current is still 0.5A), but this is not scary yet, because. after turning off the charging on the battery, about 4.15V is measured, which is below normal.

Which are different, since they have a fairly large size and weight. Such reliable charging, long, but dangerous for the battery due to the large capacity compared to them. While these types of devices are gradually falling into disrepair with a person's mobile phone charger.

The most popular today is the charger for the phone and automatically impulsive, which has an electronic timer built into it. Its operation is as follows: first, the timer mode, the maximum current, which actually stores how much portable charger.

In the future, the voltage rose to 4.4V under current, which still continued to flow regularly into an already "overfed" battery, or up to 4.3V without current, which is already an emergency shutdown limit for Li-Ion batteries.

Then, fearing for the life of the battery, I stopped the experiment. In any case, charging the battery to an emergency value means that the charger has NOT fulfilled its function. Even if he turns off the current supply, charging up to 4.3V and the battery does not explode, then a few such charges will simply ruin it, and you will have to buy a new one.

Consider the main types of chargers available today. Charger for mobile phones. . Sudden pulse of memory fear, which usually occurs when other devices are connected to the network or when the connection is poor. Transformer memory is made with protection and has a power supply. Without going into details of the electrical circuits of these coils, it can be unambiguously determined that the type of pulse charging transformer is preferable.

Car charger - a 12 volt voltage converter for the voltage needed to charge a mobile phone. The problem with the coil is that it doesn't provide the desired output current, which is not enough to power a generic laptop.

The only, perhaps, acceptable option for using this frog as a charger is a relatively short one, in order to ensure its guaranteed undercharging, recharging a completely dead battery. Maybe the manufacturers were counting on this, positioning the model as an "emergency recharge", like, you can't use it all the time, but you can risk it once or twice.

Universal chargers are quite a few varieties. One of the universal devices is known to everyone in the charger called "frog". The frog charger is a device that is suitable for charging almost all models of mobile phone batteries. The "frog" has two contacts and - they are associated with the same name as the battery. The versatility of this charge lies in the fact that these contacts can be moved to the desired battery brand.

For universal and portable chargers, a dynamo charge is included. Think of a flashlight - a dynamo that, when the handle was pressed, began to shine here, in this principle, and load the load. Charging is done by turning the button or pressing the dynamo charging lever.

But her charging speed is very good, the current is stable at 0.5A, which should be noted as a plus.
By the way, without load, the voltage at the frog contacts is 5.5V. The same as the output for connecting various USB-charged devices. Do manufacturers use one common converter?

How to build a car charger

This charger is also equipped with a variety of cable adapters for popular mobile phone models. Solar chargers are designed to charge mobile phone batteries. The principle of operation of the charger. The charger converts sunlight into electricity, which charges the built-in battery.

A wireless charging box is a charging platform that uses a mobile phone. Simply place your phone on the platform without using any connecting cable. Wireless chargers work according to the principle of induction.

This outlet is located on the back wall of the frog. A wire is stuck into it to connect various adapters to cell phones and other gadgets. By the way, the same output is also the input for charging the frog itself.

Car charger diagram

It is based on the mechanical principle of electric current by means of two electric motors. The schematic diagram of the device consists of.

How to make a car battery charger

Handle for transporting the device. . Electric generator for converting mechanical energy into electrical energy alternating current. In the armature windings of the generator, it has conductive ends that are connected to the portable rings of the portable charger.

Rotating slip rings together with armature lever on charger with electric motor charger. If the frame rotates in a magnetic field, this ensures the intersection of the lines of magnetic force, in which the electromotive force, under the influence of which the motor motor current begins to flow in the frame. The ends of the frame are connected to a sliding ring that rotates, slides over conductive brushes and transmits the generated electrical energy to the consumer. Motor electric current for converting electric current into a mechanical power source.

Fig.4. Connecting external USB gadgets through an adapter.

You can connect various adapters for charging USB gadgets to the round connector in Fig. 4.

It was not possible to check the output current of the USB output, but I believe it will be the same as when charging the battery - up to 0.5A, which is enough for most devices.

My cell phone was regularly charged from this "frog" outlet.

The internal "frog" converter is turned on manually, using a small microswitch on the side face. And you must not forget to turn it off, because. there is no indication that it is on. Only when the battery is inserted, the blue LED lights up, indicating that current is flowing out.

Fig.5. Frog converter switch.

Charging the frog itself from an external USB source did not cause any difficulties. When connected to a USB device, the red LED lights up and the process has started. The current consumed from USB is about 0.5A. Charging is always going on regardless of the position of the microswitch.

Fig.6. Charging the frog from USB.

As can be seen from the figure, it will not work to charge the frog and an external USB gadget at the same time, because. the same connector is used. But the battery inserted into the clothespin is charging.

Strange device. On the one hand, it is positioned as a charger for Li-Ion batteries, and on the other hand, it cannot charge the battery normally, it spoils it by overcharging.

It gives a large stable charge current, which is a plus, but it has an overestimated end voltage, which is a big minus. And, after all, it is much easier to provide tension. Therefore, it is necessary to use the charging of an external battery through a clothespin very carefully, only in extreme cases and in such a way as to guarantee its undercharging.

It turns out that the device can be used without reservations and conditions only as a very compact drive to power USB gadgets.

Of the pluses, we can note a set of adapters for mobile phones and a compact network adapter, which has as many as two LEDs, showing not only the presence of the output voltage, but also the output current.

Also, the “lightness” and “smallness” of this storage-charger can be considered a plus - the dimensions are the size of a matchbox and the weight is 30 grams.
This "happiness" costs 320r in the online store "" and it's up to you to decide how much this price corresponds to the capabilities of the device.

PS: A comparison of this "frog" with such drives comes to mind . The capacity of the "frog" is almost half as much, the dimensions too, but the price is almost three times lower. Plus the ability, albeit poor, to charge external batteries. Yes, and the equipment will be richer for the "amphibian". Therefore, those who are planning to buy a drive like the same UC-1 from AcmePower or an equivalent, may be worth considering purchasing the "frog" described here.

If the mobile phone is discharged, and there is no native charger at hand, you should not despair. In such a situation, a “frog” for charging batteries will be a real find. Its main advantage is versatility, ease of use, prevalence and low cost. It is suitable for batteries with different connectors. Consider the principle of operation and the rules for using the frog.

A frog is a simple device designed to charge the batteries of mobile phones of various models and manufacturers. Read more about how to charge your phone battery without a phone →

In addition, the “toad” can charge a lithium battery from cameras and other small-sized equipment.

Outwardly, it looks simple and is a plastic box with a plug on one side and a special clip for contact with the battery on the other side. The “toad” design allows it to be used for batteries with connectors of different sizes due to the movable contact terminals.

The universal fixture does not require any special technical knowledge or skills. To use the frog, there is no need to think about how to properly insert the battery into it. She herself will determine its polarity.

Varieties of universal chargers

To date, on sale you can find several varieties of devices of this type, designed for lithium batteries of mobile phones and other small-sized equipment, different in power source:

from car cigarette lighter;
from USB port;
from an electrical outlet.

Also, universal charging can be automatic and semi-automatic. The main difference is in the number of indicator lights. Automatics have three, and semi-automatics have four. The automatic "toad" itself will determine the correct polarity, and for the semi-automatic, additional control of the correct connection using the buttons will be required.

How to use the "frog"?

How to use the universal device? The algorithm for its application is simple and the same for everyone. You can charge a lithium battery of a phone, camera, camera, navigator with a frog, provided that it has the following characteristics:

capacity not more than 2000 mAh;
current 200 mA;
output voltage 3.5-4.6 V.

It will not work to charge the battery with a frog if it does not meet these characteristics.

To begin with, the battery must be disconnected from technical device. Then it is installed in the "frog" so that the terminals (+ and -) coincide with the contacts of the device. Most chargers of this type have up to 4 terminals, but, as a rule, two extreme ones are used.

The next step is to check the polarity if the model is semi-automatic. To do this, click on the Te button (it is located on the left). If the green indicator lights up, the battery is connected correctly. If the connection is wrong, use the polarity change button CO (located on the right), and then again TE. In the automatic model, the polarity itself does not need to be determined.

During operation, the PW and CH mains indicator will be active, and at the end of the process, FUL, indicating that the battery can be used further. After 2.5-5 hours after placing the battery in the device (the time depends on the battery model), it can be removed. It is fully charged and ready for use.

Important! The frog is only suitable for charging lithium batteries. Batteries of a different type, after an attempt to restore them with a “toad”, will become unsuitable for further operation.

What to do in an unusual situation

When using a universal charger, atypical situations may occur, for example, the battery is charged too quickly or the indicators are not backlit.

How to charge the battery of cellular terminals if no indicator of the working device lights up? In such a situation, it is recommended to press the CO button.

If nothing changes after that, most likely:

there is an error with the contacts, you need to change the polarity;
Battery not working;
"toad" is broken.

The device will help in a situation where the phone's battery is completely dead and has not been used for a long time. In this case, it must be placed in the frog for 10 minutes, and then charged with the native device of the terminal.

If, during operation, the device signals a full charge 10-15 minutes after connection, then it is out of order. And the FUL indicator, active when connected to the network, indicates the unsuitability of the battery.

If the FUL and PW indicator lights up at the same time, then there is no contact between the charger and the battery.

"Toad" can be easily bought in online stores, it is inexpensive. This makes it even more attractive to users. It is extremely simple, so if necessary, you can do it yourself from improvised materials. To make it, you will need a clothespin, unnecessary charging from any phone, a few pins, a wooden block, pliers, a glue gun and a soldering iron.

A clothespin is attached to the bar using superglue or a glue gun. Two pins are placed next to each other at a distance of 0.5 cm. The ears of the pins must be removed, and the tip should be driven into the piece of wood by half a centimeter. The end of the pin where the eye was located is slightly bent forward. The plug cut off from charging is attached to the pins, having previously determined the plus and minus. It is advisable to mark the polarity on the board so that later there are no difficulties with this. The fastening of pins and wires should also be strengthened with glue so that they do not loosen during operation. When using such a frog, the battery is connected to pins (homemade contacts) and fixed with a clothespin.

There are a lot of descriptions of this process and video tutorials on the network, making it will not be difficult. It will really help out in situations where it is impossible to use "native" charging for small equipment for some reason.