POWERSTACK battery technology - the most powerful, compact and lightest weight battery Get ready for performance like you've never seen before. The 18V Dewalt Powerstack Compact Battery utilizes revolutionary stacked pouch battery cell technology Packed with power - delivers 50% more power and features stacked pouch battery cell technology Works in tight spaces - Maximize space in your toolbox and get into hard to reach areas with a battery engineered 25% smaller Won't weight you down - Work overhead with a powerful battery weighing in 15% lighter Low impedance construction increases power. Delivers more power (v DCB183) Superior thermal performance versus cylindrical cells, thus increasing recharge cycles Smaller than cylindrical cell batteries (no wasted space) Compatible with all 18v Tools Includes 2 batteries