The OKTAN MAX Super Heavy Duty Battery uses manganese dioxide for the positive active material, and zinc chloride, ammonium chloride for the electrolyte. This unique construction is specially designed to ensure the product is leakage proof and has a long shelf and service life. It supplies economical power for a wide range of devices such as flashlights, radio cassettes, recorders, remote controls and clocks. Specail using as the Candle battery, Candle batteries is perfect.