Do You Know What Rechargeable Lithium Batteries Are?

Rechargeable batteries, unlike the standard ones, can be used and reused multiple times before being treated of. They have the capability to be charged and discharged repeatedly using a charger device which passes an electric current through the batteries. Electrolytic chemicals with a high degree of active life are present in rechargeable batteries. These chemicals allow the rechargeable battery to be activated and used even after it has been "exhausted" several times.

A rechargeable battery's use is not unlimited; when the active life of the electrolytic chemicals has been completely exhausted, the battery can not be recharged again. The types of rechargeable batteries vary depending on the electrolytic chemicals that are used. These include Nickel Metal Hydride (NiMH), Nickel Cadmium (Ni Cd), Lead acid, and Lithium ion rechargeable batteries. Among all the types, the Lithium ion batteries have the highest energy density rates. This reflects to the energy stored in the battery expressed as a function of weight or volume. To compare, a Lithium ion battery has a cell voltage of 3.6 volts, while NiMh and Lead acid batteries typically have cell voltages of 1.2 volts and 2.2 volts, respectively. Consequently, Lithium batteries cost the most all the other types of rechargeable batteries.

Lithium batteries are perfect for long-term use not only because of their high energy density but also because they have a low rate of self-discharge. So even if the battery is left unused for a long period of time, it does not run the risk of going dead. From the year it is manufactured, a Lithium ion battery loses only 5% -10% of its storage capacity per year. This is why Lithium ion batteries are very ideal to use in laptop computers, cell phones, digital SLR cameras, and particularly in emergency devices like smoke alarms and emergency flashlights.

Depending on the company that produced them, commercial Lithium ion batteries differ from each other based on the different Lithium compound cathodes used. Li-ion batteries of Sony use Lithium Cobalt oxide cathode and a graphite anode. Li-Manganese spinel is the cathode used by other companies like LG, NEC, and Samsung.

However, due to the highly volatile electrolytic combination used in Lithium ion batteries, they have a high risk of explosion when they short circuit or overheat. In the case of rechargeable Lithium ion batteries, prolonged exposure to direct sunlight can be very dangerous. It is very important that these batteries are purchased only from very reliable manufacturers with very high standards of quality control to ensure that they are safe and reliable.

Source by Karen Lincoln


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