High quality alkaline battery for electronic devices. Special packaging protects against unauthorized access. VARTA Specialty Alkaline Batteries are mercury-free and are ideal for a wide variety of applications that require long-term power supply, such as toys, flashlights, insulin pumps, garage door openers and many other devices. They have a specially designed packaging that can only be opened with scissors. Protects against unauthorized access, such as children. Technical Specifications: Type: 4223 Diameter: 10.3 mm Height: 28.5 mm Weight: 7.9 g Electrochemical System: Manganese Alkaline Battery Voltage: 12V