Durastart's 9-volt batteries deliver high performance power with a 100% satisfaction guarantee. Perfect for gaming controllers, remotes, clocks, kids toys, portable speakers and more, these Durastart ultra alkaline batteries are made with a mercury-free formula for safety and environmental friendliness. Whether you're powering your favorite gadgets or ensuring household devices stay up and running, the four batteries included in this package provide both dependable and long-lasting power when you need it most. WARNING! May explode or leak and cause injury if recharged, disposed of in fire, inserted backwards, or mixed with different battery types. | Durastart DS-9V4ALK 9 Volt Alkaline Batteries 4 Pack