600 or 100 blisters of 6 hearing aid batteries of the quality product Duracell Activair - made in Germany. The Duracell brand offers a particularly long-lasting, mercury-free hearing aid battery. runtime and the greatest possible comfort. Thanks to an extra long "EasyTab" tab, they are easy to grip, remove and replace, the process is easy and simple. The lightweight, yet strong, protective packaging keeps the batteries safe and secure, while also being easy to open and handle.