The lithium-polymer battery is different from conventional battery systems by the type of electrolyte used. The original design, dating back to the 1970s, uses a dry solid polymer electrolyte. This electrolyte resembles a plastic-like film that does not conduct electricity but allows ions to exchange (electrically charged atoms or groups of atoms). The polymer electrolyte replaces the traditional porous separator, which is soaked with electrolyte making it a “dry” battery. The dry polymer design offers simplifications when considering fabrication, ruggedness, safety and thin-profile geometry. With a cell thickness measuring as little as one millimeter, equipment designers are left to their own imagination in terms of form, shape and size.

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