Flashlight Battery Charger

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How Batteries Work

Ba­tteries are all over the place -- in our cars, our PCs, laptops, portable MP3 players and cell phones. A ba­tteries is essentially a can full of chemicals that produce electrons. Chemical reactions that produce electrons are called electrochemical reactions. In this article, you'll learn all about ba­tteries -- the basic concept at work, the actual chemistry going on inside a battery, rechargeable versions, what the future holds for ba­tteries and possible power sources that could replace them.

If you look at any battery, you'll notice that it has two terminals.  One terminal is marked (+), or positive, while the other is marked (-), or negative. In an AA, C or D cell (normal flashlight batteries), the ends of the battery are the terminals. In a large car battery, there are two heavy lead posts that act as the terminals.

Electrons collect on the negative terminal of the battery. If you connect a wire between the negative and positive terminals, the electrons will flow from the negative to the positive terminal as fast as they can (and wear out the battery very quickly -- this also tends to be dangerous, especially with large batteries, so it is not something you want to be doing). Normally, you connect some type of load to the battery using the wire. The load might be something like a light bulb, a motor or an electronic circuit like a radio.

­Inside the battery itself, a chemical reaction produces the electrons. The speed of electron production by this chemical reaction (the battery's internal resistance) controls how many electrons can flow between the terminals. Electrons flow from the battery into a wire, and must travel from the negative to the positive terminal for the chemical reaction to take place. That is why a battery can sit on a shelf for a year and still have plenty of power -- unless electrons are flowing from the negative to the positive terminal, the chemical reaction does not take place. Once you connect a wire, the reaction starts. The ability to harness this sort of reaction started with the voltaic pile.

Next, we'll check out how a voltaic pile works and look at other types of batteries.

About the Author

Laptop Batteries,Adapters,Chargers,notebook battery Laptop battery AU is everyone\'s battery store for Dell laptop battery, Acer laptop battery, Toshiba laptop battery, Compaq laptop battery, Camcorder battery, Canon camcorder battery, Camera battery, Power tools battery, Laptop AC adapter and Laptop DC adapter.

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Charging cell phone without the charger....Any science geniuses out there?

You know in elementary, there was a kid who came in with a potato clock for his science fair project? Even though that was a long time ago, I wanted to do the same sort of thing with my cell phone. I was looking it up, and there was a video on how to charge my phone with a handcrank flashlight. That would be awesome, but I dont have time to sit there and crank my phone battery to life. I'd love an idea on how to do this more easily!!

Well, I know when I put my phone in it's case and I don't bother it, it charges. It like goes from the medium bar to the full in like 30 min! Hope I helped!

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