The Bosch Professional GBA 18V 5.0Ah battery is designed for a longer runtime in Bosch´s 18V category. Its higher capacity enables 25% more runtime than the 18V 4.0 Ah Professional. This battery also features COOLPACK 1.0 technology for 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. The battery is compatible with all Bosch Professional 18V tools and chargers (Professional 18V System). The GBA 18V 5.0 Ah Professional is a Lithium-ion (Li-ion) battery with a fuel gauge displaying thebattery level status.