Rayovac L13ZA-16ZM Hearing Aid 1.4 Volt, Size 13 Batteries, 16 Pack Overview: The Rayovac Zinc Air, Mercury-Free Hearing Aid Batteries are the world's longest-lasting and pose no threat to the environment. These cells have no added mercury and pass the U.S. Environmental Protection Agency's toxicity tests for cadmium and lead. No hearing aid battery lasts longer than Rayovac. The #1 choice of hearing professionals. Model: L13ZA-8ZM Features and Benefits: World’s Longest Lasting Mercury Free Hearing Aid Battery Recommended by 7 of 10 Hearing Health Professionals 2nd Generation, Mercury Free formula with a higher voltage for quick start-up Superior cell design that resists swelling leakage, providing optimal performance and greater consistency Our longest tab available makes removing the battery from the package and inserting it into the device easy The perforated package allows the dial to be removed for convenient transport Environmentally friendly package made with recycled or recyclable materials Specifications: Stock Code: L13ZA-16ZMCDN Brand: Rayovac Part No: L13ZA-16ZM Battery Type: Zinc Air Voltage (V): 1.4 Volt Battery Size: 13 Capacity: 301 - 400 mAh Capacity: 310 mAh Height (in): 5.4 mm Diameter (in.): 7.9 mm Case Quantity: 16 UPC: 012800527236 * Remember to let your hearing aid batteries sit un-tabbed for one minute before putting them into your hearing aid. Giving the battery that extra minute allows air to enter and activate your battery.