The Duracell Coppertop 9V Alkaline Batteries come in an 8 pack, with each battery having a voltage of 9V and a chemical composition of alkaline. These single-use batteries are perfect for various consumer electronics devices that require reliable power sources, making them a versatile and practical choice for everyday use. With a long expiration date of March 2029, these batteries offer long-lasting power for an extended period of time, ensuring that your devices remain powered for an extended period.