The Energizer Size 10 Hearing Aid Batteries AZ10DP come in a pack of 24, with a total of 48 batteries included. These batteries have an expiration date of 8/27, making them valid for use until that date. With a voltage of 1.45V and a capacity of 100 mAh, these zinc-air batteries are designed to provide reliable power for your hearing aid. Made in the United States, these size 10 batteries are a convenient and essential aid for daily living.