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Saturday, August 3, 2019

What is Lithium-ion Batteries and How do they works?

Lithium-ion batteries are the fastest-growing type of rechargeables; there are probably lithium-ion batteries in your cellphone, MP3 player, and laptop computer. What's so good about lithium? It's a lightweight metal that easily forms ions, so it's excellent for making batteries. The latest lithium-ion batteries can store about twice as much energy as traditional NICd rechargeables, work at higher voltages, and are more environmentally friendly, but don't last as long. Even so, they can be charged and discharged hundreds of times and typically last several years, so they're great for everyday use in electronic gadgets that aren't meant to last that long.

How do they work?

When you plug a cellphone or laptop into the power supply, the lithium-ion battery inside starts buzzing with chemical activity. The battery's job is to store as much electricity as possible, as fast as possible. It does this through a chemical reaction that shunts lithium ions (lithium atoms that have lost an electron to become positively charged) from one part of the battery to another. When you unplug the power and use your laptop or phone, the battery switches into reverse: the ions move the opposite way and the battery gradually loses its charge. Read more in our main article on how lithium-ion batteries work.

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