Bosch GBA18V ProCore Li-Ion High Performance Battery 18V (4.0Ah)

The Bosch GBA18V ProCORE 18V 4.0Ah battery offers higher performance, longer life and lighter weight in a smaller size package.
When other batteries cannot handle the heat and switch off, ProCore 18V batteries power through. The combination of the latest generation high capacity cells and improved CoolPack 2.0 technology results in a very compact design. This battery has 87% more power thanks to the latest cell technology and intelligent battery management. Power output is similar to an 800W mains powered device. COOLPACK 2.0 technology gives it 135% longer life and prevents the battery from overheating even when worked at maximum output.

Battery level indicator gives you a good idea of how much battery power is being used when working with certain materials or bits. ProCORE batteries are 100% compatible with all new and existing Bosch Professional 18V power tools and chargers.