Lithium polymer batteries are based on lithium ion technology but have flexible form factor and higher safety. Because of the aforementioned higher specific energy and a higher degree of freedom in fabrication, a critical advantage of lithium polymer batteries is that they are ideal in applications in which space and weight are an important manufacturing consideration. They can be produced in varieties of shapes, sizes and easily customized. Lithium polymer batteries use either solid, porous, or gel-like electrolyte instead of a traditional liquid-based electrolyte. They do not explode due to gas built-up and not leak in case of excessive heat. They simply swell or expand in size. The absence of leakage also means that the electronic components of a particular device are safe from battery issues.

Thanks to characteristics of high energy density, safty, flexible design, and longer running than other kinds of batteries, lithium ion batteries have made this chemistry more suitable for consumer devices. They are fast replacing Ni-Mh/Ni-Cd cells as the preferred power source used on these devices and have quickly taken over the consumer electronics market in the last few years. These applications include smart phones, wearables, bluetooth, toothbrushes, mobile video recording, tablet pc, laptop computer and other products with the characteristics of light weight, compact size and portability.