A type of a battery composed of Lithium, the lightest metal and the metal that has the highest Electrochemical potential. Lithium, however, is an unstable metal, so Lithium-Ion batteries are made from Lithium ions from chemicals. Because of its lightness and high energy density, Lithium-Ion batteries are ideal for portable devices, such as Mobile(Portable devices). In addition, Lithium-Ion batteries have no memory effect and do not use poisonous metals, such as lead, mercury or cadmium. The only disadvantage to Lithium-Ion batteries is that they are currently more expensive than NiCad and NiMH battery packs. In 1991, the Sony Corporation commercialized the first lithium-ion battery. Other manufacturers followed suit. The high cell voltage of 3.6 volts allows battery pack designs with only one cell. Most of today’s mobile phones run on a single cell.
Advantages of Li-ion Batteries follows
1) Relatively low self-discharge – self-discharge is less than half that of nickel-based batteries.
2) Low Maintenance – no periodic discharge is needed; there is no memory.
3) High energy density – potential for yet higher capacities.
Despite its overall advantages, lithium-ion has its drawbacks. It is fragile and requires a protection circuit to maintain safe operation. Built into each pack, the protection circuit limits the peak voltage of each cell during charge and prevents the cell voltage from dropping too low on discharge. Aging is a concern with most lithium-ion batteries and many manufacturers remain silent about this issue. The battery frequently fails after two or three years. Manufacturers are constantly improving lithium-ion. Storage in a cool place slows the aging process of lithium-ion. Manufacturers recommend storage temperatures of 15°C (59°F). Thank you.
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