Duracell Coppertop 9 Volt alkaline batteries deliver reliable, long-lasting power to your everyday devices throughout the home, like toys, flashlights, portable electronics, and more. Our Duracell 9 V alkaline batteries are guaranteed for 5 years in storage, so you can rest assured they will be ready when you need them. From storm prep to holiday needs, Duracell is the # 1 trusted battery brand.