Duracell Optimum AAA batteries have a unique blend of lithium and nickel which is called Power Boost. These AAA batteries are designed to provide higher energy density and stronger operating voltage than conventional alkaline batteries. By delivering more energy than traditional alkaline AAA batteries, Duracell Optimum Power Boost helps improve device performance where extra power is needed most. This pack contains 12 batteries.  Delivering up to 200% more life in specific mid-to-high-drain equipment, motorised toys, powerful LED torches, medical devices, wireless mice and keyboards. Consumers benefit from longer usage times or enhanced performance in devices with high energy demands. As modern devices require higher power output, consumer electronics are placing increasing demands on battery performance. Key Features Up to 200% more life 100% recyclable, plastic free packaging Available in packs of 4, 8 and 12