Li-ion is lighter, more stable, higher capacity than conventional nickel-cadmium batteries, and can be used for a long time because there is no natural discharge.

Cap Ass`y which is applied to Li-ion battery consists of 5 parts. Each part is cap plate, gasket, pin, insulator, terminal which becomes a component of the battery cell together with the membrane and the electrolyte. Produces gaskets and insulators among the applicable components and Cap Ass`y is assembled.