Rayovac High Energy C Batteries (12 Pack) Alkaline C Cell Batteries Power your household with Rayovac High Energy C Alkaline Batteries. Engineered for long-lasting performance these Rayovac C Batteries are ideal for the high use devices in your home including flashlights toys and stereos. Rayovac batteries are rigorously tested to ensure they do what they say they ll do—plain and simple. These alkaline C Batteries last up to 10 years in storage. Each C battery is made for dependable performance. For reliability in the devices you use each day count on Rayovac for C Cell Batteries.