Bosch 1600A02DZ4 GBA18V120 CORE18V® 18V Lithium-Ion 12AH High Power Battery - The Bosch CORE18V® 12AH High Power Battery delivers equal power and at least 50% more runtime than the CORE18V® 8AH battery, powering high-demand applications. The GBA18V120 features three layers of enhanced 21700 cells for greater battery efficiency. The battery has Bosch-exclusive CoolPack™ 2.0 technology, which cools the battery faster and helps provide longer lifetime compared to Bosch 18V batteries without CoolPack™ 2.0. With its cutting-edge battery design – including copper end plates, power rails and a flexible circuit board – it offers reduced resistance and increased efficiency. It weighs only 3.04 lbs., providing performance comparable to larger and heavier alternatives. It includes a charge-status indicator with high resolution for clear visibility.