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Can you convert an 18v battery charger made for 120v mains to a 240v Is it a different transformer on the circuit board or more complex?
Wiki User
∙ 16y ago
Little Transformers which convert the 240 volts supply voltage to 120 volts are readily available. They are called International Travel Adaptors. One of those would probably be able to handle the small current needed by the 18 volt battery charger. == == This question is too complicated to answer fully without using lots of electrical engineering words that many people would not understand. If there is something that looks like a transformer on the circuit board, it may not be one. It might be a miniature inductive load. (A "choke" in old times terms.) Even if it is a miniature transformer it may not be used for changing the mains voltage to 18 volts. Someone who really understands electrical circuits and the components in them would not be asking this question, so, unless you know exactly what you are doing, leave that charger's circuit board just as it is. This is for your own personal safety and for anyone else who might one day use that battery charger.
Wiki User
∙ 16y ago
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What type of transformer is used in a phone battery charger and its ratings?
Usually these "wall wart" chargers are small switching regulated power supplies, not transformers. A transformer may be part of the switching regulator circuit, but it is only one small part of it.The ratings of the switching regulated power supply will vary with different types of phones, but are always printed on a label on the "wall wart" casing. Read the label.
How to charge a dc battery with ac output?
The best way to charge a battery from an AC source is to use a high-quality commercial battery charger that is of the correct voltage and charging profile for your battery. By "charging profile," I mean a charger that is matched to the battery's chemistry and amp-hour capacity. WARNING: Not every type of battery is rechargeable, and even rechargeable batteries can do nasty things if they are not charged properly. If you are not sure you have the right charger, please ask someone for help. If you want to make your own charger, the answer to "how" depends upon the AC source, the kind of battery, and how "good" a charger you want to make. At a minimum, you need some kind of rectification of your AC power. Your battery will tend to discharge during the part of the cycle where it is not reverse-biased, so you will need something like a diode to make sure the battery can't drain itself back into the charging circuit. Cheap chargers for car batteries, for example, are sometimes nothing more than a transformer (to convert the mains voltage down to something suitable for the battery) and a rectifier (two or four diodes). More sophisticated charger circuits are used to maximize battery life (heat from recharging can damage batteries, so charging circuits use various strategies to control the heat) and to provide the appropriate charging profile for the battery chemistry. You'll see a pretty dramatic shortening of the life of your batteries if you don't use a specialized circuit to charge some kinds of batteries. For this reason, you may want to use a commercial charger. If you really want to build a charger, try to get a kit or build from a known-good circuit.
Should you connect both ends of a battery in to a circuit?
The circuit won't do anything until both terminals of the battery are connected to the correct [two different] points in the circuit. As long as either terminal of the battery remains disconnected, the circuit is "OFF".
Will a new battery fix the charging problem for dell inspiron 1525?
Not necessarily. There could be different components at fault when your laptop fails to charge properly - the power supply (power brick), the charging circuitry inside the laptop for the battery, and/or the battery itself (which in itself also has a circuit for diagnosis, telemetry [battery level, battery health], and overcharge protection).
What causes short lifetime of battery How to prolong the lifetime of battery?
1)Reason: a.Charger or electro circuit can't be fit for the battery. b.Overcharge and overdischarge, etc. c.Battery can't comply with the charging requirement 2)Solution: a.Use the original charger. b.Charge the battery after it automatically powers off , then full charge the battery. c.Avoid erroneous usage of battery, such as heavy pressure, short circuit, fall off and so on.
How do you build a transformer using a battery charger?
Ni-Cd , Ni-HM and other rechargeable batteries are in massive use now a days.Let me not describe the use , importance and bla bla of the rechargeable batteries.What we are going to talk about here is how to make simple battery charger circuit to recharge your rechargeable batteries.Making a battery charger circuit is very simple , Simply step down the mains voltage using a step down transformer and convert the current into DC and stabilize it using a bridge rectifier circuit.But you might not want to use a transformer in your circuit to maker your battery charger circuit small and handy.If you don't want to use a a transformer to step down the mains voltage then you can also use a resistor and a capacitor to step down the voltage and stabilize it.And you can see the circuit diagram of a battery charger below which is not using any transformer. Battery charger circuit diagram:So here is a simple battery charger circuit diagram:Click on the image to enlarge it:Battery charger circuit diagramYou can see the values of the components used below:R1: 56 giga ohms resistorR2: 220 Mega ohms resistorC1: 105 Kilo pico farad , 250 voltage capacitorD1: IN 4007 DiodeD2: Light emitting diode indicatorD3 : IN 4007 DiodeIf you use the values of the components stated above the circuit can recharge a 3 voltage rechargeable battery , You can change the value of R1 and C1 to get recharge battery of more voltage.
Is a battery charger a rectifier?
Inside a 12 volt battery charger, one of the main components is a transformer used to lower the supply voltage to 14 VAC. The other main component is the diode bridge. It is a full wave bridge network which uses four diodes for voltage rectification. The open circuit output of the battery charger is about 13.8 VDC. So, no a battery charger is not a rectifier but it used the process of rectification in its operation.
Can you run 220vac on 120vac on battery charger?
Your question is confusing. First off a battery charger puts out DC voltage not AC. If you are asking if you can run a 120 volt battery charger on a 220 volt circuit the answer is no you cannot. That would destroy the charger.
Wiring diagram century battery charger?
I had the same problem. After many years my much loved Century charger failed. You cannot get parts for the older charger. All I did was to locate the 12 volt output wires of the secondary of the transformer and connected them to the terminals of two newly purchased Radio Shack rectifiers. The output going to plus and minus alligator clips. Your breaker is probably in the primary circuit. You cant believe how simple a charger is. Most of the circuits are embellishments and can be eliminated. Do the same thing with the 2 volt out put of the transformer. Eliminate the battery booster circuit. It is something waiting to go wrong. Dont throw away your old Century battery charger. It has a heavy duty transformer and a thick heavy duty cabinet. Wal Mart type chargers are not worth the powder to blow them up. Once you have simplified the circuit it will be easy to service and more dependable. If you cant find the wires mentioned get a qualified technician to help you. You will be glad you did not throw away that Century charger. It is worth its weight in gold. The auto charge section is salesmanship. When the current no longer drops, your battery is charged. Also, get rectifiers double that required.
How do you charge a 12volt battery from a 220volt home system?
With a 12 volt battery charger that is made to plug into a 220 volt circuit.
What type of transformer is used in a phone battery charger and its ratings?
Usually these "wall wart" chargers are small switching regulated power supplies, not transformers. A transformer may be part of the switching regulator circuit, but it is only one small part of it.The ratings of the switching regulated power supply will vary with different types of phones, but are always printed on a label on the "wall wart" casing. Read the label.
Can a 110 mAh battery replace a 90 mAh battery?
Yes and no. The higher capacity battery will last longer, but you need to consider the charger. It depends on the design of the circuit.
What does a red blinking light mean on a Ni-MH battery charger?
It could mean anything from "your battery is charged" to "the regulator circuit has failed." Unplug the charger and consult the manual, or check the manufacturer's website.
What does short circuit current available mean?
If you take a power source like a dc battery or AC transformer secondary winding and connect an ammeter directly across these power sources you can read the short circuit current available from that source. This gives a measure of internal resistance of the battery or the available wattage of the transformer.
Can you convert a 24 volt battery charger to 12 volts?
You can try to charge two 12 V batteries at the same time . Using a series circuit, place both batteries next one to another, and connect the negative pole of one of them to the positive pole of the other. Then use the remained poles to connect to the charger. The only other way possible, is to change the transformer, but this would be as expensive as buying another charger.
How does the auto shut off system in a battery charger work?
there are several ways you could get a charger to shut off, most of them use a circuit that detects when the draw amps get low indicating the battery has full charge. when the battery fills with electrons a back pressure or resistance goes up
What is the difference between battery charger and intelligent battery charger?
a simple battery charger only charges the battery and having no feedback from the battery status, it can cause overcharging, increase temperature, and can damage the battery or in worst case can blow up the battery, also mitigates the life time of the battery. whether intelligent battery charger charges the battery and get feedback from the battery , when the battery gets fully charged it Cut off the charging circuit itself, also maintain the charging at its trickling current to control the temperature. simply it shows the status of the battery. i hope its the Good answer. thanks although the intelligent battery charger charges the battery and get feedback from the battery,the batteries have different charge characteristics. For example ,some intelligent battery charger detect △V and △T to control charge. However when batteries has been charged fully,they will show different characteristics. some battery has show the voltage dropped,but in fact they has not been charged fully,even charged a little just because the wave input voltage.some batteries has show the voltage dropped,but the batteries has charged fully for a long time.So acccording to the △V not to determine the fully charged.△T has the same problem and when the same battery charged fully will come different temperature,if the charging current is different. So △T is worse than the △V. Finally,although the intelligent battery charger can get feedback,now the battery charge characteristic is unsure.So it is no sense. I think battery charge should be distinction by constants current or constants voltage.they will produce obvious different effect of charge.
