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Batteries
Batteries are sources of chemical energy that are used in circuits to provide electrical energy for a wide range of useful devices. Any questions and answers regarding batteries or other power supplies would be welcome here.
4,818 Questions
How long do battery brands last?
No set answer to that. it depends on the capacity of the battery and the power drain of what the battery is connected to.
Do I need batteries for this watch?
It ranges from CR2302 to many other types. most are CR2302, however you should research because many different watch companies make models which are different. (For instance, I have two Seiko watches, one is CR2302 and one is not)
What size battery goes in a fossil blue am3457 watch?
I have the same problem! I called Fossil, gave them the # and the woman on the phone was SO polite and helpful! SR621SW cross reference # is 364 which is a Rayovac 364, or a Duracell D364. Hope this helps you, it sure did me!
How do you hook up a lemon to a battery pack?
It's actually possible to connect a lemon to a battery--especially if that battery is another lemon. While this statement may seem confusing, it really isn't. One popular lemon battery experiment shows students how to create a voltaic battery with a lemon. This type of battery converts chemical energy into electrical energy. Further exploration of this principle will allow you to connect one lemon battery to another lemon battery. One lemon will produce approximately 7/10 of a volt of electricity. And two lemon batteries connected to each other generally create enough energy to power a digital watch.
Why does one end of the battery have a negative symbol on it?
because batteries works on the principle of electron charge and an electron can have either a more positive or negative charge but the electron wants to have an equal amount of pos. and neg. charge so when batteries are simply they pull the positive charge to one side and negative to the other side and when they come together with a conductor(wire) it creates a current which does the "work" for you. The voltage of the battery pretty much lets you know how strongly the battery wants to create equality between each side thus more current.
What are some of the best rechargeable batteries out there that will last a long time?
Rechargeable batteries are special because they are specially made to do so. Batteries that are capable of recharging will be stated on the label (eg. duracell rechargeable) and are usually more expensive.
What type of battery can be used again and again?
You can use a rechargeable battery over and over again.
How does a Dry Cell battery work?
An electromotive force is generated from chemical reactions inside the cell. Carbon - zinc, iron - nickel, lead - sulphuric acid, are common ones. An individual cell is just that, a cell. Strictly, a battery is a collection of such cells
Where can you buy a Duracell battery?
Duracell batteries can be purchase almost anywhere. For example if one wanted to purchase Duracell batteries locally, one can shop at places such as Walmart, Target or even Canadian Tire. If one wanted to shop online, they can do so by browsing the websites eBay as well as Amazon.
How does a battery compare to a solar panel?
A battery is a storage tank for electrons. The battery runs things from stored power created elsewhere. Think of it like the hot water heater, you want a longer shower, get a bigger tank. But if the water is shut off, the shower is a moot point.
A solar panel makes power from sunlight. The solar panel is most like a generator, but a generator makes power from gasoline.
Electricity moves at the speed of light, so if you don't have a battery to catch the power made by your generator or solar panel, the generator or solar panel must be on to run the appliances. A battery allows you to catch small amounts of power all day, and then turn on the microwave when you need it.
What are the disadvantages of using rechargeable batteries for a portable keyboard?
Some of the disadvantages of using rechargeable batteries is the price. They are more expensive than disposables, especially if you use few battery operated items at home. They also have known to have caught fire fire while being recharged.
Does the electrons go from the battery plus to - or is it the other way around?
Yes. The electrons, which are negatively charged, are pushed away from the negative terminal, which has excess electrons, and they and flow to the positive terminal where there are less electrons.
Do rechargeable batteries have the same mAh?
This will work. You can use it. The smaller one may be damaged before long though
The smaller one will run down first, so the extra capacity of the other one won't give any benefit in electronics, were the device tends to shut down at some predetermined terminal voltage. If you do this in something dumber like a flashlight, you will see a noticeable dimming as the smaller one's terminal voltage drops, and at that point you should stop using the battery until it (both cells here) can be recharged. it depends on how connected is series sure except the small ma/hour will determine longevity in parallel that is a very bad idea the weaker one will tend o drag the healthy one down even to the point of failure. Even if both are the same ma/h do not tie them in parallel
Can a 12V 10Ah battery be used in a motorcycle that's supposed to use a 12V 9Ah battery?
That should be no problem, since the voltage is the same. The 10 Ah simply means the battery will store more energy, and therefore last longer.
Will AA battery substitute for um3?
I will say no. I did install regular alkaline batteries and they died very soon and started to leak.
How does a battery charger work?
A battery charger is an electrical appliance which produces direct current at a voltage high enough to safely fill up a rechargeable battery with new electric charge.
OK, what does that mean?
To be able to explain how they work you will need to know what is inside them. If you have some knowledge of physics and chemistry that would come in handy too, but anyway here goes...
Any item with no moving parts which can produce a direct current flow of electricity is known as a "cell". Every cell contains two different plates. The plates are held fixed and separated from each other. They are placed in a special chemical fluid or paste which conducts electricity. One plate is called the "positive" ("+ve"), the other is called the "negative" ("-ve") . Each plate must be made of a different type of material to the other.
The plates can then react with the special chemical in such a way that an electrical current can be drawn off from the cell. [It may be worth mentioning here that if both plates were made from the same material then no difference in voltage would be produced between them and no current could be taken from the cell. Nor could it be charged up.]
As current is drawn from the cell its plates - and the special chemical in which the plates are placed - all gradually change their chemical composition. The result is that, as current is drawn off, the charge stored in the cell is reduced. Another result is that the voltage given out by the cell drops. If nothing is done to replace the charge that has been taken from the cell then, eventually, a point is reached when no more charge can be taken out. That happens because the chemical composition of the plates and the special fluid can change no further. The cell is then called "flat" or "dead".
The actual types of materials used to make a cell determine the output voltage it produces. The physical size of a cell determines both 1) how much charge the cell can produce during its life and 2) how fast it can release that charge. (The bigger the cell, the higher is the total charge it can produce along with a higher charge release rate.)
That is how all "AA", "AAA" or similar non-rechargeable cells work. Exactly the same kind of process takes place in the cells in a car battery, except that the process is reversible. In other words, the plates and the special chemical can be changed back to almost the same condition as they had when they were first charged-up. In cars, and other vehicles which use a battery, the battery is usually kept charged-up by the vehicle's own standard battery charging system.
If something went wrong (either with the vehicle's charging system, or with the battery itself) then a separate "battery charger" can be used to try to restore the charge. However a worn-out old battery simply won't hold its charge any more and a battery charger won't be able to fix it. The battery would have to be replaced.
A typical ordinary car battery has six cells in it, wired up so that they give a total voltage of around 13 volts when the battery is fully charged and just below about 12 volts when it is "flat". The plates in each cell contain a metal called "Lead" (the element which has the chemical symbol "Pb"), and the special chemical which the plates are immersed in is Sulphuric Acid.
Some battery chargers have a meter to show the current flowing into the battery. The meter is not strictly necessary but is useful because you can see that the battery is being given new charge.
When the battery has taken up all the charge it can hold, the fluid (sulphuric acid in the case of a standard car battery) will start to get warm and a "fizzing" noise may be heard. That "gassing" noise is hydrogen and oxygen gas being released from the fluid.
If that happens the battery charger should be switched off and taken away from the battery. The reason for doing this is because those gases could explode if a spark happened near to the battery or someone leant over it whilst smoking a cigarette!
Some battery chargers have an auto-shut off system to stop any more charge being put into the battery when it is full. That should prevent the cells from gassing but it is really never safe to leave a charger "on" after the battery charging has finished.
A battery charger is a device which uses electric current from an outlet to recharge batteries on electronic devices. Not all batteries are rechargeable however.
Can a 4400 mah battery replace a 2100 mah battery?
There should be no problem in a cell phone, it will take a little longer to charge but it will also give you 33% more operating time before you need to recharge the phone.
Have batteries got better through time?
I don't think it has really, the concepts are all the same, it's just the materials that have changed.
http://en.wikipedia.org/wiki/History_of_the_battery
Yes batteries are a form of electricity know as DC or Direct Current. Direct current is produced by such sources as batteries ,thermocouple's cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric charge flows in a constant direction, distinguishing it from alternating current or AC.
Change the battery in a mazda 5 key fob?
The fob must be gently pried apart, the electronics unit removed, the battery replaced, the electronics unit reinstalled, and the fob snapped back together. Your owner's manual should tell you how, if not ask your dealer.
What is inside a six volt lantern battery?
I took a dead one apart and found that my Dorcy Mastercell Heavy Duty 6-volt cell contains four cells wired together. Each cell is the circumference of a D-cell, but is longer--the length of the 6-volt casing.
I have read that Duracell 6-volts contain four regular Duracell D-cells wired together with a styrofoam block to fill the space in the bottom (what a scam). I have also read that Energizer NIMH rechargeable D-cells contain a AA battery and filler--again, what a scam. It is said that you can figure out what you're getting by understanding the mAh ratings on the package--but who understands that stuff?
