With the unique bosch cool pack technology the cells in special 18 volt lithium ion batteries are perfectly protected because the especially conductive material red cooling fins on the bottom guides heat directly out of the battery to prevent possible overheating of the cells for an up to 100 longer lifetime in addition to this using the latest cell technology in the new 40 ah battery packs ensures an up to 65 longer runtime extremely compact due to shortest design only 195 mm in its class and