Power Tools for Professionals



18V CORE18V Lithium-Ion 4.0 Ah Compact Battery

The Bosch CORE18V 4.0 Ah Compact Battery is designed to keep the power and runtime, while losing the weight. The GBA18V40 single-layer battery features advancements in design to reduce resistance and increase efficiency, to improve the performance-to-weight ratio of tools used on the jobsite all day. The battery is a truly flexible power system providing compatibility with a full range of Bosch 18V Li-ion cordless tools. The GBA18V40 is engineered with 21700 cell technology, matching the power from the original two-layer 4.0 Ah battery with improved performance per cell. The Bosch-exclusive CoolPack 2.0 heat-management system results in 15% faster cooling and 135% longer life compared to previous non-Bosch CoolPack 18V batteries.

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  • (1) 18V CORE18V Lithium-Ion 4.0 Ah Compact Battery


  • Compact 4.0 Ah battery – delivers 2X the runtime compared to previous generation BAT612 2.0 Ah battery
  • Compact power – lightweight, compact solution
  • High-power Li-ion cells – feature a single layer of enhanced 21700 cells for greater battery efficiency
  • Bosch-exclusive CoolPack 2.0 technology – cools the battery 15% faster and provides 135% longer lifetime compared to non-CoolPack Bosch 18V Lithium-ion batteries
  • Cutting-edge battery design – includes copper end plates, power rails and a flexible circuit board for reduced resistance and increased efficiency
  • Weighs only 1.10 Lbs. – 4.0 Ah Compact battery provides performance comparable to much heavier batteries
  • System compatibility – compatible with a full range of Bosch 18V Li-ion cordless tools; not optimized for use with PROFACTOR tools
  • Charge-status Indicator – features a high-resolution charge-status indicator

Technical Data

Battery Chemistry Lithium Ion
Battery Watt Hours 72.0Wh
Height 1.85"
Length 4.6"
Weight 1.1lb
Width 3.0"
Includes (1) 18V CORE18V Lithium-Ion 4.0 Ah Compact Battery
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