A lithium-ion polymer battery (abbreviated as LiPo, LIP, Li-poly, lithium-poly, and others) is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a liquid one. These batteries provide higher specific energy compared to other lithium battery types and are being used in applications where weight is a critical feature.
A typical cell has four main components: a positive electrode, a negative electrode, separator, and electrolyte. The exact voltage ratings should be specified in product data sheets, with the understanding that the cells should be protected by an electronic circuit that won’t allow them to overcharge nor over-discharge under use.
By themselves, the cells are over 20% lighter than equivalent cylindrical cells of the same capacity.
Being lightweight is an advantage when the application requires minimum weight, such as in the case of radio-controlled models.