This pack of Duracell® CopperTop Alkaline Batteries, 21/23, 4/PK is perfect for powering your electronic devices. The batteries are designed to provide reliable and long-lasting power, ensuring that your devices keep running smoothly.

With a voltage of 12V and a capacity of 0.8 Ah, these batteries are suitable for a range of devices that require a 9V block battery. They are also made with alkaline chemistry, which is known for its high energy output and longer shelf-life. These batteries come in a pack of four and are perfect for use in a variety of consumer electronics.