These 9V Alkaline Batteries are ideal for high use devices including toys, clocks, smoke detectors and more. Plus, they’re designed to prevent damaging battery leaks and tested twice prior to shipment to ensure reliability. Rayovac High Energy 9V Alkaline Batteries are long lasting, guaranteed — plain and simple.Rayovac 9V Batteries Hold Power Up to 5 Years in Storage. Designed to Prevent Damaging Battery Leaks & Tested Twice Prior to Shipment. Ideal for High Use 9V Battery Devices & Toys, Clocks, Smoke Detectors & More. 9 Volt Batteries, 8 Pack of High Energy Alkaline Batteries.