Guide to battery technologyBatteries are a part of almost every piece of technology, and without them the world we know wouldn’t not exist. Everything from CD-player, MP3-players, laptops, cell phones, all use batteries.
Basically, batteries are made from may layers of metals, interspersed with chemicals.
How do batteries work
The process is quite simple. The chemicals inside the batteries produce electrons, process called electrochemical reaction. Every battery is equipped with two terminal: one positive and one negative. Electrons collect at the negative terminal. If you connect the positive side and the negative site, the flow of electrons will go to the positive terminal and the battery will discharge. This is why batteries use loads. By loads we mean motors, light bulbs etc. By connecting the battery to the load, the electrons first pass through it and then go to the positive terminal. This way the battery doesn’t waste all it’s power.
Types of batteries
There are many types of batteries. Lead acid batteries are used at cars. There are zinc carbon batteries, otherwise called AA, C and D batteries. Duracell and Energizer are just two examples of alkaline batteries that have a zinc core and manganese-oxide electrodes. Pacemakers use lithium iodide batteries, while laptops and cell phones use lithium ion batteries. Other types of batteries include nickel cadmium, zinc mercury-oxide and nickel metal hydrides.
Rechargeable or single use
If you apply electric energy to a battery, the flow of electrons is inversed. This means that they travel from the positive side to the negative side, restoring the batteries’ power. To recharge some batteries you will need a special adapter. Not all batteries are rechargeable though. Lead acid batteries, nickel metal hydride and lithium ion batteries are all rechargeable while zinc carbon batteries are not.
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