PERFORMANCE: Delivers 50% more runtime and over 75% more power than core18v 4 ah battery, powering high-demand applications EFFICIENCY: Features two layers of enhanced 21700 cells for greater battery efficiency BOSCH-EXCLUSIVE COOLPACK 2.0 TECHNOLOGY: Cools the battery and helps provide longer battery lifetime compared to non-coolpack bosch 18v batteries CUTTING-EDGE BATTERY DESIGN: Includes copper end plates, power rails and a flexible circuit board, offering reduced resistance and increased efficiency COMPACT OPERATION: Weighs only 2.14 lbs., for the ideal balance of size, weight and power CHARGE-STATUS INDICATOR: Features high resolution for clear visibility FLEXIBLE POWER SYSTEM: Compatible with a full range of bosch 18v li-ion cordless tools; optimized to drive bosch profactor tools with biturbo brushless technology, for power comparable to the most demanding corded tools CHARGE-STATUS INDICATOR: Features a high-resolution charge-status indicator COMPATIBILITY: Engineered for 18v and compatible with bosch 18v tools and chargers HIGH POWER: Optimized to drive bosch profactor tools with biturbo brushless technology