The Bosch Professional Battery Pack GBA 18V 4.0 Ah (1600A01922) is a lightweight and compact 18-volt battery designed to deliver reliable power and enhanced performance. Featuring advanced COOLPACK technology, it offers up to 100% longer lifetime compared to batteries without COOLPACK by effectively dissipating heat. Its lightweight design ensures greater comfort during use, particularly for overhead applications. As part of the Professional 18V System, this battery and its compatible charger can be used across all Bosch 18V tools, providing maximum flexibility and convenience on the job.