The Bosch GBA 36V Professional Battery is a powerful battery designed for maximum runtime in Bosch's 36V category. COOLPACK 1.0 technology achieves an improved heat dissipation from the inside to the outside of the battery. As heat can damage the cells, the COOLPACK technology provides a longer battery lifetime and enables it to perform for longer work periods. There is also a fuel gauge displaying the battery level status. Compatible with all Bosch Professional 36V tools and chargers.