Polymer Lithium ion Battery has a number of attractive attributes for use in battery power. It is the lightest of all metals, has the greatest electrochemical potential and represents the largest energy density in kilograms. Consequently, re-chargeable batteries using lithium metal anode (negative electrode) are able to provide a large voltage and excellent capacity, leading to a significant high energy density.

After significant analysis to re-covered lithium-ion batteries in 1980, it was found that the changes induced by cycling the lithium electrode in the potential fire danger. These changes, which are part of the normal wear and tear, reduced thermal equilibrium cell, causing a potential runaway heat problems. When these circumstances occur, cell temperature quickly approaches the melting point of lithium, which caused a violent reaction, often referred to as "turning with a flame." Demonstrate this problem, a significant amount of rechargeable lithium sent to Japan was called in 1991 after the battery on a mobile phone generated by burning gases and inflicted burns to the owner a person.

This overheating and fire risk due to natural fluctuations in lithium metal, especially through the re-loading process will lead to a change in scientific studies of non-metallic lithium battery using lithium ions. Although Lithium-ion is a slightly lower energy density than lithium metal, lithium-ion is intrinsically safe, if special precautions are in place when re-loading and discharging. As a result of these innovations, Sony manufactured and sold the first Li-ion battery for commercial use in 1991. Quickly after the other battery manufacturers developed and sold his own variation on the re-chargeable Lithium-ion battery. Currently, Li-Ion battery is the most rapidly expanding and most exciting technology of batteries in the market on the basis of electronic equipment requirements.

Lithium-Ion batteries usually published twice the energy density than NI-CD Rechargeable Battery. Among other innovations and improvements in electrode active materials increased energy density to almost 3 times that of Ni-Cd batteries. Along with large capacity cargo capabilities are substantial and discharge electrical energy behaves as nickel and cadmium in terms of discharge quality.