Bosch GBA18V40-2PK 18V CORE18V Lithium-Ion 4 Ah Advanced Power Battery, 2-Pack

LIGHTWEIGHT SOLUTION: Allows you to get the power and lose the weight in a compact battery | POWER AND RUNTIME: Delivers 2x the runtime and 60% more power compared to bat612 18v 2 ah battery | HIGH-POWER LITHIUM-ION CELLS: Features a single layer of enhanced 21700 cells for greater battery efficiency | CUTTING-EDGE BATTERY DESIGN: Includes copper end plates, power rails and a flexible circuit board for reduced resistance and increased efficiency | BOSCH-EXCLUSIVE COOLPACK 2.0 TECHNOLOGY: Cools the battery and helps provide longer battery lifetime compared to non-coolpack bosch 18v batteries | COMPACT OPERATION: Weighs only 1.10 lbs. but provides power for standard to medium-duty applications, such as drilling into concrete, metal and wood; metal grinding; cutting and even light-duty chipping | CHARGE-STATUS INDICATOR: Features high resolution for clear visibility | COMPATIBILITY: Engineered for 18v and compatible with bosch 18v tools and chargers | AMPSHARE SYSTEM: Compatible with the ampshare system, a battery system designed to be multi-brand compatible across many cordless products to make managing your work day easier | AMPSHARE SYSTEM COMPATIBILITY: 18V batteries and chargers are compatible with bosch 18v power tools and a growing list of cordless products from ampshare brands