Rayovac - RAY81530PPFUSK Fusion AA batteries excel in today's most power-hungry devices, including digital cameras, high-powered toys and grooming devices. Pro Pack contains 30 advanced alkaline batteries. Energy-dense formula provides more power. Slim Seal technology maximizes internal battery capacity. Increased anode density improves discharge efficiency. Improved cathode formulation enhances electrical conductivity. Mercury-free, advanced alkaline batteries stay fresh in storage for 10 years.