... Energy saving heater, fast heating speed,designed for battery Ceramic Heater Existing Specification:Dimension:42*36*1.2mmVoltage ... insulation allow direct contact with water, kerosene and metal. 3. High Reliability Superior dielectric strength and electrical insulation. ... noise,white,tidiness, non-rust,non-pollution , non-rupture,no weak soldering 3.7V heater,ceramic heater, small size, battery heater