Conducting polymer  Lithium-ion polymer battery  Lithium-ion
polymer batteries, polymer lithium ion, or more commonly lithium
polymer batteries (abbreviated Li-poly, Li-Pol, LiPo, LIP, PLI
or LiP) are rechargeable batteries which have technologically
evolved from lithium-ion batteries. Ultimately, the lithium-salt
electrolyte is not held in an organic solvent as in the lithium-
ion design, but in a solid polymer composite such as
polyethylene oxide or polyacrylonitrile. The advantages of Li-
poly over the lithium-ion design include lower cost
manufacturing and being more robust to physical damage. Lithium-
ion polymer batteries started appearing in consumer electronics
around 1996.    Since no metal battery cell casing is needed,
the battery can be lighter and it can be specifically shaped to
fit the device it will power. Because of the denser packaging
without intercell spacing between cylindrical cells and the lack
of metal casing, the energy density of Li-poly batteries is over
20% higher than that of a class