The SKC181-101 is the perfect way to kick off your Bosch cordless power tool system. The Bosch 3.0 Ah battery features Electronic Cell Protection which guards against overheating, overmold, and deep discharge. Cool pack technology pulls heat away from the battery to increase overall battery life by 100% when compared to previous generations. The SCK181-101 is compatible with any Bosch 18 Volt Lithium-Ion tool, making it extremely convenient across tools. It features a visible battery fuel gauge, so you no longer have to guess when you need to charge the battery.