Ray-O-Vac High Energy 9V Alkaline Battery reliable and long-lasting power for a variety of devices including calculators, electronic gadgets, smoke alarms, and digital cameras. These mercury- alkaline batteries feature Ready Power technology, ensuring they maintain strong performance and are for up to 5 years in storage. With a battery capacity of 750 mAh and a voltage of 9V, they provide steady energy to keep your devices running smoothly. Whether you need a single battery or a pack of eight, this battery is designed to meet your power needs with confidence and durability. Model Number: A1604-1K