The longest-lasting zero-mercury* hearing aid batteries Energizer has ever made. EZ TURN & LOCK design keeps unused zinc air hearing aid batteries safe and secure. Longer tabs clearly marked with the size and color signifying the battery type make it easy for shopping, handling and inserting these hearing aid batteries. 100% recyclable packaging and zero-mercury batteries responsibly power you with less impact on the environment. Perforated top lets you fold the package for easy travel and storage *based on high-drain performance | Energizer EZ Turn & Lock Size 13 Hearing Aid Batteries Size 24 pack