Kirkland Signature Premium Quality Hearing Aid Batteries deliver reliable, long-lasting power for size 10 hearing aids. These zinc-air batteries provide 1.45 volts of mercury-free power, making them safe and environmentally responsible. Made in Germany and packaged in six convenient 8-battery blister packs for a total of 48 batteries. Each battery features a yellow color-coded tab for easy size identification. Zinc-air technology activates when the protective tab is removed and air enters the battery, providing consistent power output throughout the battery's life. Users typically get 5 to 7 days of use per battery depending on hearing aid usage patterns and features. The individual blister packaging protects batteries from premature activation and maintains freshness with a 4-year shelf life.