While commanding a slight price premium compared
to Lithium Ion, Lithium-polymer batteries (Li-Polymer) offer several
advantages. It has a greater energy density in terms of weight than
Lithium Ion. In very thin cells (under 5mm) Lithium-polymer also
provides higher volumetric energy density. Additionally, there is
more flexibility in cell sizes and shape with Li polymer and a wider
margin of safety, with superior stability in over-voltage and high
To date, most Lithium-polymer applications are for widely used consumer
items like cell phones, MP3 players and many Bluetooth enabled devices
where low weight and small size are essential. Like Li-ion, Lithium-polymer
cells require protection circuitry.
Overall, rechargeable Lithium battery chemistries are the most rapidly
evolving¡ªand their technology will continue to improve as the need
for ever smaller, lighter and more powerful portable energy increases.