Bosch GBA18V40 CORE18V 4.0 Ah Battery

21700 Lithium-ion cell technology delivers the right power solution for heavy-duty cordless power tool applications.

Gba18 V40 Hero
Bosch2 10163588

The only thing that can make increased battery power more attractive is putting all that additional performance in a smaller package. With the help of greater power efficiency found in 21700 Lithium-ion cell technology, Bosch has developed the GBA18V40 CORE18V 4.0 Ah battery to bring all of the capability of the original CORE battery into a smaller, lighter package. The new cell introduces much more active battery volume in a pack that’s only slightly larger than the previous 20700 cell packs.

  • Designed to make day-to-day work easier, particularly repetitive applications and overhead tasks. The Bosch design allows the power cells to be arranged in a single layer, which adds to a smaller and lighter battery.
  • Bosch CoolPack 2.0 technology advances the lifetime of the battery as well, delivering up to 135 percent longer life versus conventional batteries without CoolPack. 
  • The battery is designed without space gaps, which ensures any heat produced by the cells is not stored in the interior.
  • Optimized cell connectors made of copper versus copper-coated galvanized steel offer lower resistance for increased power output over a longer period of time.
  • Bosch CORE18V batteries provide 100 percent compatibility with all 18-volt Bosch Lithium-ion tools and chargers.
  • Bosch is developing high-power tools to take full advantage of CORE battery technology.


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