Hearing aid battery to be used in super power BTE models Product Directions: Remove and discard the plastic tab covering air holes. Allow the battery to stand for one minute to ensure proper activation. The battery compartment must allow for an adequate oxygen supply to reach air holes. Place the battery in the hearing aid battery compartment. Product Component: Zinc, steel, SS-Nickel plating, SS-Copper plating, Carbon Black, Potassium Hydroxide solution, Lead, Water, Paper, Plastic, Surfactant