This product is a lot of 5 Energizer Size 13 hearing aid batteries, totaling 16 batteries with an expiration date of 02 09 2025. These batteries are compatible with AA sizes and have a battery capacity of 37 with 22 Ah of amp hours. They have a voltage of 1.45V and are made with a zinc-air chemical composition. The batteries are manufactured in the United States and come in a unit quantity of 16.