The cordless negative ion hair care cap consists of a breathable flexible body with an elastic band around the edges so that the cordless negative ion hair care cap fits snugly on the head. On the inner surface of the flexible body there is a plurality of electrical heating elements and at least one negative ion generator, and on the outer surface of the flexible body there is a controller with an electrical circuit and a socket for a battery. In this utility model, the controller is used to set the time and temperature and control the electrical heating elements and the negative ion generator to generate heat and negative ions. The generated heat and negative ions are transferred to the inside of the flexible body and evenly distributed there to transfer heat to the hair on the head. When used in combination with conditioner, curlers and other items, this utility model provides various functions for drying hair, hair care, hair fixation and the like. 3 C.p. f-ly, 5 dwg
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