Homemade automatic battery charger 12V. How to make charging for a car battery from a transformer. Schematic diagram of a car charger

The need to charge the battery occurs in many motorists. Some for these purposes use branded chargers, others enjoy homemade gland, manufactured at home. How to do and how to charge the battery such a device? We will tell about this below.

[Hide]

Design and principle of work

A simple charger for is a device used to recover battery charge. The essence of the functioning of any stroke is that this device allows you to convert voltage from a household network 220 volts to the voltage required for. To date, there are many types of memory, but at the heart of any device lies two main components - this is a transformer device, as well as a rectifier (author of the video on how to choose an instrument for charging, the battery canal).

The process itself consists of several stages:

• when charging the battery, the charging current parameter decreases, and the resistance level increases;
• at that moment, when the voltage parameter is approaching 12 volts, the charging current level comes to zero - at this moment the battery charges completely, and the memory can be turned off.

Instructions for making a simple memory with their own hands

If you want to make a charger for car battery By 12 or 6 volts, then we can help you. Of course, if you have never come across such a necessity before, but you want to get a functional device, it is better to purchase an automatic purchase. After all, the homemade charger for the car battery will not have such functions as the branded device.

Tools and materials

So, to make a battery charger with your own hands, you will need these items:

• soldering iron with consumables;
• textolite plate;
• wire with a fork for connecting to the household network;
• radiator from computer.

Depending on, an additionally can be used ammeter and other components that allow you to correctly charge and control the charge. Of course, to make a car charger, you also need to prepare a transformer node and a rectifier for charging the battery. By the way, the hull itself can be taken from the old ammeter. The ammeter housing has several holes to which you can connect the desired items. If you do not have an ammeter, you can find something similar.

Photo gallery "Preparing for the assembly"

Stages

To build a charger for a car battery with your own hands, do the following:

1. So, you first need to work with a transformer. We will show an example of making a self-made zoom with a TC-180-2 transformer device - such a device can be removed from the old tube TV. Such devices are equipped with two windings - primary and secondary, and at the output of each secondary component, the current is 4.7 amps, and the voltage is 6.4 volts. Accordingly, the homemade memory will issue 12.8 volts, but for this, the winding must be connected by a sequential way.
2. To connect the windings, you will need a cable, the cross section of which will be less than 2.5 mm2.
3. Using a jumper, you need to connect both secondary and primary components.
4. You will then need a diode bridge, take four diode elements for its arrangement, each of which should be designed to work under current conditions at least 10 amps.
5. The diodes are fixed on the textolite plate, after which they will need to connect correctly.
6. Cables are connected to the output diode components, with which the homemade zoom will be connected to the battery. To measure the voltage level, you can additionally use the electromagnetic head, but if this parameter does not interest you, the assembling of an ammeter designed for d.C.. By completing these actions, the charger will be prepared with your own hands (author of the video about the manufacture of the simplest instrument in the design of the device is a TV soldering iron TV).

How to charge acb self-made charger?

Now you know how to make a charger for your car at home. But how to use it correctly, so that this does not affect the resource of the charged battery?

1. When connected, the polarity always needs to be observed so as not to confuse the terminals. If you allow an error and confuse the terminal, from simply "kill" the battery. So always the plus wire from the memory is connected to the plus of the battery, and negative to minus.
2. Never try to check the battery on the spark - despite the fact that there are many recommendations on the Internet regarding this, to slow down the wires in no case. This will negatively affect the work of the memory itself and the Akb itself in the future.
3. When the device connects to the battery, it must be disconnected from the network. The same applies to its disconnection.
4. In the manufacture and assembly of the memory, and during its use, always be careful. To not be injured, always follow safety, in particular, working with electrical components. In the event that errors will be made during the manufacture, it may cause not only human injury, but also failure of the AKB in general.
5. Never leave a working memory unattended - you need to understand that this is a homemade device and in its work can happen anything. When charging the device with the battery must be in a ventilated room, as far as possible from explosive materials.

Video "Example of build a homemade zone with your own hands"

The video below shows an example of a homemade memory assembly for automotive battery For a more complex scheme with basic guidelines and tips (the author of the roller is Aka Kasyan channel).

Automatic devices represent a simple design, but very reliable in operation. The design has been created when using simple without unnecessary electronic additions. They are designed for a simple charge of batteries of any vehicles.

Pros:

1. Charging will serve for many years With proper use and properly maintenance.

Minuses:

1. Lack of any protection.
2. Exception of the discharge regime and the ability to recover the rechargeable battery.
3. Heavy weight.
4. Quite high cost.

Classic consists charging Of the following key items:

1. Transformer.
2. Rectifier.
3. Adjustment unit.

Such a device produces a direct current under a voltage of 14.4V, not 12V. Therefore, according to the laws of physics, it is impossible to charge one device to others if their voltage is the same. Guided by the above, the optimal value for such a device is 14.4 volts.

Key components of any charger are considered:

• transformer;
• network fork;
• fuse (carries out short circuit);
• wire rheostat (adjusts the charging current);
• ammeter (shows the power of electric current);
• rectifier (converts a variable to constant current);
• resostat (regulates current strength, voltage in electrical circuit);
• light bulb;
• switch;
• housing;

Wires for connecting

To attach any charger use, as a rule, red and black wires, red - it is a plus, black - minus.

When you select cables, to connect a charging or starter, you need to choose a cross section of at least 1 mm 2.

Attention. Further information is posted for informational purposes. All you want to realize in life, you do at your discretion. Incorrect or inept handling of those or other parts and devices will result in a malfunction.

Looking at the available types of charging devices, we turn directly to the manufacture with your own hands.

Charging for battery from a computer power supply

To charge any battery, there are enough 5-6 amps-hours, it is about 10% of the capacity of the entire battery. Make it, maybe any power supply with a capacity of 150 W.

So, consider 2 ways independent manufacture Charger from a computer power supply unit.

Fashion first

For the manufacture need the following details:

• power supply, power from 150 W;
• resistor 27 com;
• r10 current regulator or resistor unit;
• wires from 1 meter length with;

Progress of work:

1. To start We need to disassemble the power supply.
2. Remove Unused Wires, namely -5B, + 5V, -12V and + 12V.
3. Making a replacement resistor R1 on the pre-harvested resistor 27 com.
4. Remove wires 14 and 15, and 16 simply turn off.
5. From block Displays a network cord and wires to the battery.
6. Install the current regulator R10. In the absence of such a regulator, you can make a homemade block of resistors. It will consist of two 5 W resistors that will be connected in parallel.
7. To configure the charger, In the board set the variable resistor.
8. To the outputs 1,14,15,16 We solder the wires, and the resistor set the voltage of 13.8-14.5V.
9. On the end of the wires We attach terminals.
10. Remove the remaining unnecessary tracks.

IMPORTANT: Hold the full manual, the slightest evasion can lead to the burnout of the device.

Method of the second

For the manufacture of our device according to this method, the power supply will be required slightly more powerful, namely 350 W. Since he can issue 12-14 amps, which will satisfy our needs.

Progress of work:

1. In the power blocks from the computer The pulse transformer has several windings, one of them for 12V, and the second is 5V. For the manufacture of our device, only winding is needed by 12V.
2. To start our block It will be necessary to find a green wire and close it with a black wire. When using a cheap Chinese block, it may not be green there, and the gray wire.
3. If you have an old sample power supplyand with the power button, the above procedure is not needed.
4. Further, make up 2 thick tires from yellow and ferrous wires, and cut the unnecessary wires. The black tire will be a minus, yellow, respectively, plus.
5. To increase reliability Our device can be replaced by places. The fact is that on the 5V tire there is a more powerful diode than 12V.
6. As in the power supply is a built-in fan, he is not terrible overheating.

Method Third

For the manufacture, we will need the following details:

• power supply, 230 W;
• board with chip TL 431;
• 2.7 com resistor;
• resistor 200 Ohm with a capacity of 2 W;
• resistor 68 Ohm with a capacity of 0.5 W;
• resistor 0.47 Ohm with a capacity of 1 W;
• relay on 4 contacts;
• 2 diode 1N4007 or similar diodes;
• 1k resistor;
• bright LED;
• the length of the wire is at least 1 meter and the cross section is at least 2.5 mm 2, with terminals;

Progress of work:

1. Fuck All wires except 4 black and 2 yellow wires, as the nutrition comes on them.
2. Close the jumper contactsresponsible for protection against overvoltage so that our power supply is not turned off from overvoltage.
3. We replace on the board with the microcircuit TL 431 Built-in resistor on a resistor of 2.7 kΩ, to set the output voltage of 14.4V.
4. Add a resistor 200 Ohm With a power of 2 W on the output from the channel 12B, to stabilize the voltage.
5. Add a resistor 68 ohm With a power of 0.5 watts to exit channel 5B, to stabilize the voltage.
6. We drop the transistor on the board with the chip TL 431, To eliminate obstacles when installing the voltage.
7. Replace standard resistor, in the primary chain of the transformer winding, on the resistor 0.47 Ohm with a capacity of 1 W.
8. We collect protection scheme from ne. proper connection to battery.
9. We drop out of the power supply Unnecessary parts.
10. Take down Required wires from the power supply.
11. We solder the terminals to the wires.

For ease of use, the charger is connected to the ammeter.

The advantage of such a self-made device is the absence of a battery recharging.

The simplest device using the adapter

Adapter for cigarette lighter

Now consider the case when there is no unnecessary power supply, our battery sat down and need to be charged.

Each good owner or fan of all sorts of electronic devices has an adapter to recharge autonomous equipment. Any 12V adapter can be used to charge a car battery.

The main condition for such charging is no less issued voltage by the source than that of the battery.

Progress of work:

1. Necessary Cut the connector from the end of the adapter wire and believes insulation at least 5 cm.
2. As the wire goes dualIt is necessary to divide it. The distance between the end of 2 wires must be at least 50 cm.
3. Shipping or primarily to the terminals terminals for reliable fixation On the battery.
4. If the terminals are the same, then you need to take care of the signs of differences on them.
5. The biggest inconvenience of this method It consists in constant control over the adapter temperature. Since if the adapter is overrigent, it can output the battery from the operating state.

Before turning on the adapter to the network, you must first connect it to the battery.

Charger from diode and household light bulb

Diode - It is semiconductor electronic devicewhich is capable of conducting a current in one direction, has a resistance equal to zero.

The charge adapter for a laptop will be used as a diode.

For the manufacture of this type of device, we will need:

• adapter Charging to a laptop;
• light bulb;
• wires length from 1 m;

Each charger for the car gives about 20V voltage. Since the diode replaces the adapter and passes the voltage only in one direction, it is protected from a short circuit that can happen when improperly connected.

The greater the power of the bulbs, the faster the battery charge occurs.

Progress of work:

1. To the positive laptop adapter wire Connect our light bulb.
2. From light bulb Throw the wire on the plus.
3. Minus from adapter We directly connect to the battery.

In the case of proper connection, our light bulb will glow, because the current on the terminals is low, and the voltage is large.

Also, you need to remember that the correct charging provides for the average current strength within 2-3 amps. Connecting light bulb high power, leads to an increase in current, and this, in turn, adversely affects the battery.

Based on this, connect high power light only in special cases.

This method provides for continuous monitoring and measurement of voltage on terminals. The reload of the battery will lead to a rich release of hydrogen, and it can fail.

When charging the acb in this way, try to be located near the device, since temporary leaving it unattended can lead to the failure of the device and the battery.

Check and configure

To check our device, it is necessary to have a good car light bulb. At first, with the help of the wire we connect our light bulb to charging, remembering the observance of polarity. Include charging to the network and the light bulb caught fire. Everything is working.

Each time, before using a self-made charging device, check it on working capacity. Such a check will exclude all the possibilities to deal with your battery.

Car Battery Charging Procedure

Pretty large number of car owners consider charging the battery is a very simple matter.

But in this process there is a number of nuances, on which the long battery work depends:

Before you put a battery for charging, you need to hold a number of necessary actions:

1. Use Chemically resistant gloves and glasses.
2. After removing the battery Carefully inspect it on signs of mechanical damage, traces of fluid flowing.
3. Unscrew protective coversFor the output of the hydrogen released, in order to avoid boiling battery.
4. Carefully look at the fluid. It should be transparent, without flakes. If the color of the liquid is dark and there are signs of sediment, immediately contact the specialists.
5. Check the fluid level. Based on the existing standards, on the side of the battery there are marks, "minimum and maximum" and if the fluid level is below the desired, it is necessary to replenish it.
6. Flood It is only possible distilled water.
7. Do not turn on Charger to the network until the crocodiles are connected to the terminals.
8. Observe polarity When connecting crocodiles on the terminals.
9. If in the charging process Boiling sounds will be heard, turn off the device from the network, allow the time to cool the battery, check the fluid level and then you can re-connect the charger to the network.
10. Follow the battery not rechargingSince the condition of its plates depends on this.
11. Conduct charging AKB Only in well-ventilated premises, since toxic substances are released during the charging process.
12. Electrical network Must have installed machines that turn off the network in case of its closure.

After you put a battery for charging, over time the current will fall, and the voltage on the terminals will increase. When the voltage reaches 14.5V - the charging should be discovered from the network. When the voltage is reached, more than 14.5V, the battery will start boiled, and the plates are freed from the liquid.

Important. Never recharge your battery, it can lead to loss of its tank and failure.

Each motorist is sooner or later there are problems with the battery. I did not escape this fate and me. After 10 minutes of unsuccessful attempts to start your car, I decided to acquire or make the charger itself. In the evening, making an audit in the garage and finding a suitable transformer there decided to charge himself.

There, among unnecessary junk, there was a voltage stabilizer from an old TV, which in my opinion is wonderfully suitable as a hull.

Having shifted the endless expanses of the Internet and actually appreciating my strength chose the most simple scheme probably.

Printing the scheme went to a neighbor who is fond of radio electronics. For 15 minutes I scored the necessary details for me, cut off a piece of foil textolite and gave a marker for drawing boards. Having spent around the hour of time, I painted an acceptable fee (installation of the spacious size of the hull allow). How to streak a fee to tell me, about this a lot of information. I took my creation to my neighbor, and he prohibited her. In principle, you could buy a circuit board and do everything on it, but as they say to a gift horse ....
Drilling all the necessary holes and withdrawing to the monitor screen of the transistors, I took the soldering iron and after about an hour I had a ready-made fee.

Diode bridge can be bought on the market, the main thing is that it is designed for current at least 10 amps. I found diodes D 242. Their characteristics are quite suitable, and on a piece of textolite I saved the diode bridge.

Thyristor must be installed on the radiator, since when working it is noticeably heated.

Separately, I must say about the ammeter. He had to buy in the store, there the seller consultant picked up and the shunt. The scheme decided to modify a little and add the switch so that the voltage can be measured on the battery. Here, too, it took a shunt, but when measuring the voltage it is not connected in parallel, but in sequence. The calculation formula can be found on the Internet, it will be added from myself that the power dissipation of the shunt resistors is of great importance. According to my calculations, she had to be 2.25 watts, but I got a 4 watt shunt. The reason for me is unknown, there is not enough experience in such matters, but by deciding that I basically need an ammeter reading, and not a voltmeter, I followed. Moreover, in the voltmeter mode, the shunt was noticeably heated for 30-40 seconds. So, by collecting everything you need and checking everything on a stool, I took the case. Fully disassembled the stabilizer, I took all his stuffing.

By placing the front wall, I drilled holes for an alternating resistor and the switch, then the drill of the small diameter around the circle drilled the holes under the ammeter. Sharp edges frustrated with a file.

A little bit of her head over the location of the transformer and the radiator with a thyristor, stopped at this option.

I bought a couple more crocodile clamps and all-charging is ready. A feature of this scheme is that it works only under load, so collecting the device and not finding the voltages at the outputs voltmeter do not rush me to scold. Just hang on the conclusions at least a car light bulb, and you will be happy.

Take a transformer with a voltage on the secondary winding of 20-24 volts. Stabilitron D 814. All other elements are indicated in the diagram.

The analysis of more than 11 schemes for making your own hands at home, new schemes 2017 and 2018, how to collect a fundamental scheme for an hour.

TEST:

To understand whether you have the necessary information about batteries and chargers for them, you should pass a small test:

1. What is the main reasons, the car battery is discharged on the road?

A) the motorist left the vehicle and forgot to turn off the headlights.

B) the battery is too heated under the influence of sunlight.

1. Can the battery fail if the car does not use for a long time (it is in the garage without launch)?

A) with a duty, a simple battery will fail.

B) No, the battery will not deteriorate, it will only be necessary to charge and it will function again.

1. Which current source is used to recharge the battery?

A) There is only one option - a network with a voltage of 220 volts.

B) network for 180 volts.

1. Be sure to remove the battery when connecting a self-made device?

A) It is advisable to dismantle the battery from the installed place, otherwise the risk will damage the electronics by the intake of a large voltage.

B) it is not necessary to remove the battery from the installed place.

1. If you confuse "minus" and "plus" when connecting the memory, then the battery will fail?

A) Yes, when improperly connected, the equipment is scorified.

B) Charger Just not turn on, you will need to move the necessary contacts to the laid seats.

Answers:

1. A) No headlights when stopped and minus temperature are the most common reasons for the battery discharge on the road.
2. A) Akb fails if it is not necessary to recharge it for a simple car.
3. A) to recharge the network voltage in 220 V.
4. A) it is not desirable to charge the battery homemade deviceIf it is not removed from the car.
5. A) should not be confused terminals, otherwise homemade apparatus Perjector.

Battery On the vehicle require periodic charging. Causes of discharge can be different - starting from headlights that the owner forgot to turn off, and to negative temperatures in winter on the street. For feeding AKB It will take good charger. Such a device in large varieties is presented in auto parts stores. But if there is no possibility or the desire to buy, then Zause You can make it yourself at home. There is also a large number of schemes - they are preferably studied to choose the most suitable option.

Definition: The charger for the car is intended for the transmission of electric current with a given voltage directly to Akb.

Answers to 5 frequently asked questions

1. Will it take some additional measures before you start charging the battery on your car? - Yes, you will need to clean the terminals, since acid deposits appear during operation. Contacts It must be cleaned very well to clean the current without difficulties to go to the battery. Sometimes motorists use lubrication to handle terminals, it should also be removed.
2. What to wipe the terminals of the charger? - Specialized tool can be bought in the store or prepare yourself. As an independently made solution, water and soda use. Components are mixed and mixed. it excellent option For processing all surfaces. When the acid becomes contact with soda, then the reaction will occur and the motorist will definitely notice it. This place will need to thoroughly wipe to get rid of all acids. If the terminals were previously treated with lubricant, then it is removed by any clean cloth.
3. If there are covers on the battery, then you need to open before you start charging? - If the lids are on the housing, they are definitely removed.
4. For what reason do you need to unscrew the lids with the battery? - It is necessary that the gases formed in the process of charging are free from the housing.
5. Is there a need to pay attention to the level of electrolyte in the battery? - This is done necessarily. If the level is lower than the required, then you need to add distilled water inside the battery. The level to determine will not be difficult - the plates must be completely covered with liquid.

Another important to know: 3 nuances of operation

Homemaking by method of operation is somewhat different from the factory option. This is explained by the fact that the purchase unit has built-in functions Helping in work. They are difficult to install on the device assembled at home, and therefore will have to adhere to several rules when operation.

1. The charger assembled with your own hands will not be turned off when charging the battery. That is why it is necessary to periodically monitor the equipment and connect to it multimeter - To control the charge.
2. Need to be very neat, not to confuse "plus" and "minus", otherwise charger grill.
3. Equipment must be turned off when connecting to charger.

Fulfilling these simple rules, it turns out to correctly produce a feedback AKB And prevent unpleasant consequences.

Top 3 Charger Manufacturers

If there is no desire or the opportunity to collect with your own hands Pray That pay attention to the following manufacturers:

1. Stack.
2. Sonar.
3. Hyundai.

How to avoid 2 errors when charging the battery

It is necessary to comply with the basic rules to properly focus battery. by car.

1. Directly to the electrical stub rechargeable battery It is forbidden to connect. For this purpose, charging devices are intended.
2. Even device It is made high quality and of good materials, you still need to periodically observe the process. charging So that trouble do not happen.

Performing simple rules will provide reliable operation of independently made equipment. It is much easier to monitor the unit than after spending on the components for repair.

The simplest charger for the battery

Scheme 100% of the working memory by 12 volts

Look at the picture on the scheme Zause On 12 V. The equipment is intended to charge automotive batteries with a voltage of 14.5 volts. The maximum current obtained by charge is 6 A. But the device is also suitable for other batteries - lithium-ionic, since the voltage and output current can be adjusted. All major components for assembling the device can be found on Aliexpress.com.

Required components:

1. dC-DC lowering converter.
2. Ammeter.
3. Diode Bridge KSRS 5010.
4. Hubs 2200 μF by 50 volts.
5. transformer TC 180-2.
6. Circuit breakers.
7. Plug for connecting to the network.
8. Crocodiles for connecting terminals.
9. Radiator for a diode bridge.

Transformer Any one is used, at its own discretion, the main thing is that its power is not lower than 150 W (with a charging current of 6 A). It is necessary to install thick and short wires on the equipment. The diode bridge is fixed on a large radiator.

Look at the picture on the Charger Scheme Dawn 2.. It is composed of original Head. If you master this scheme, you will independently create a high-quality copy, not different from the original sample. Constructively, the device is a separate unit closed by the body to protect the electronics from moisture and exposure to bad weather conditions. On the base of the case, a transformer and thyristors on radiators must be connected. A fee will be required that will stabilize the charge charge and control thyristors and terminals.

1 scheme of smart memory

Look at the picture of the intelligence scheme charger. The device is necessary for connecting to lead-acid batteries having a capacity of 45 amps per hour or more. Connect such a type of device not only to batteries, which is used daily, but also to duty or in reserve. This is a rather budgetary version of the equipment. It does not provide indicator, And the microcontroller can be bought the cheapest.

If there is a necessary experience, the transformer is going to do it. No need to install also audio alert signals - if battery It will be connected incorrectly, the discharge light light will notify the error. It is necessary to put the pulse power supply unit by 12 volts - 10 amps.

1 scheme of industrial memory

Look at the industrial scheme charger From Bars 8a equipment. Transformers are used with one power winding by 16 volts, several VD-7 and VD-8 diodes are added. This is necessary in order to provide a bridge scheme of the rectifier from one winding.

1 inverter scheme

Look at the picture of the diagram of the inverter charger. This device before starting charging discharges a battery to 10.5 volts. The current is used with the value of C / 20: "C" denotes the capability of the installed battery. Thereafter process The voltage rises to 14.5 volts, with the help of a discharge-charging cycle. The ratio of charge and discharge is ten to one.

1 Electronics Electronics

1 scheme of a powerful memory

Look at the picture on a powerful charger for a car battery. The device is used for acid Akb, having a high container. The device easily charges a car battery having a capacity of 120 A. Output voltage The device is adjusted independently. It ranges from 0 to 24 volts. Scheme Noteworthy in that there are few components installed in it, but it does not require additional settings.

Many could see Soviet charger. It looks like a small box of metal, and may seem very unreliable. But it is not at all. The main difference between the Soviet sample from modern models is reliability. Equipment has a structural power. In the event that to the old device Connect an electronic controller, then charger It turns out to revive. But if there is no such thing at hand, but there is a desire to collect it, it is necessary to study the scheme.

To features Their equipment includes a powerful transformer and rectifier, with which it turns out to be quickly charged even highly discharged. battery. Many modern devices will not be able to repeat this effect.

Electron 3m

For an hour: 2 Charging schemes do it yourself

Simple schemes

1 simplest scheme for automatic memory for auto battery

Each owner of the used car faces the need to recharging the battery. In addition, rechargeable batteries are often used as a backup (or main) source of electricity in the garage, shed, in the country without centralized supply with electricity.

To restore the battery charge, you can buy ready, there is no shortage in the proposal.

Used to charge a car battery

However, many homemade masters prefer to make their own hands. If you have a radio engineering education, the scheme can be calculated independently. And for most lovers who know how to keep a soldering iron in their hands, we offer a couple of simple designs.

First of all, we define what batteries you need to charge. As a rule, it is acidic starter batteries used in cars.

This battery can be cheap purchased in the car shop, or to use the old left from the replacement on your car. Used may not be able to work as a starter, but to connect a lighting device (especially LED) or a radio receiver at the cottage - easily.

How to calculate the self-made charger?

The first rule that must be learned is the magnitude of the charge voltage.
Lead batteries have a working voltage within 12.5 volts. But for the charge it is necessary to submit a voltage in the range of 13.9 - 14.4 volts. Accordingly, the charger must be done with such output parameters.

The next value is power.
More precisely, the current strength at which the voltage drops on the output terminals will not occur. If you do not plan to charge the battery with a capacity of more than 65 A / h - enough steady current 12 A.

Important! This value should provide exactly the output stage of the charger, the current of the current at the inlet 220 volts will be several times less.

A low-power charger can be charged and high-capacity batteries. Only time will need significantly more.