Bosch GBA 18V 4.0Ah Battery Pack 1600Z00038

4.0 Ah battery with extended runtime in the 18 V category Delivers 100% more runtime than the 18V 2.0 Ah model due to its higher battery capacity COOLPACK 1.0 improves heat dissipation from the inside to the outside of the battery for longer lifetime and runtime Compatible since 2008: all of our batteries are compatible with new and existing Bosch Professional tools in the same voltage class. The GBA 18V 4.0 Ah Professional battery is designed for extended runtime in Bosch´s 18 V category. Due to its higher battery capacity, it delivers 100% more runtime than the 18V 2.0 Ah model. 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 18 V tools and chargers (Professional 18V System). The GBA 18V 4.0 Ah Professional is a Lithium-ion (Li-ion) battery with a fuel gauge displaying the battery level status.