Make the good times last with Rayovac Fusion Alkaline Batteries. The most powerful alkaline battery from the #1 value brand in the world, Rayovac Fusion delivers maximum performance to high drain devices. These advanced alkaline batteries are engineered with a Universal Power system to provide optimal performance in a variety of devices. Use these Rayovac batteries in your wireless headset, video game controller and high-powered toys. An Enriched Core provides a longer battery life to keep your devices running, and increases dependability to last up to 15 years in storage (Size AA). The patent pending Micro-Separator provides more room for active ingredients while its synthetic design increases reliability. With all that energy inside, these high performance Rayovac batteries are ready to power the devices you use each day.