What is a Lithium Ion Battery ? How does it work ?

Lithium Ion Batteries find wide application in mobile phones and other electronic devices.  In Lithium ion batteries, Lithium metallic oxide is the anode while carbon is used as the negative electrode.  Lithium ions are transferred between the lithium oxide anode and the carbon electrode during charging and in the opposite direction while discharging.  

The higher power density and the high voltage per cell (3.6 V) ensures that a single battery can be used.   Lithium Battery can hold charge more effectively than other batteries.  A typical lithium battery loses 5% of its energy every month.  

Lithium ion battery packs typically have a small in built electronic control device which continually monitors the temperature, voltage and current.  It shuts down the battery when there is a deviation from established limits.  

Lithium Ion batteries are extremely sensitive to temperature and can degenerate faster.  The Lithium battery should never be completely discharged. If that happens the chip which controls the battery will no longer be powered.  The battery cannot be used again.  

There have been rare cases when lithium ion batteries catch fire.  This is mostly due to defects in the manufacturing process.  

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