The M12 FUEL; 1/4" Hex 2-speed Screwdrivers POWERSTATE Brushless Motor runs cool with no wearable components. The REDLITHIUM 2.0 Compact Battery Pack delivers more power and recharges than standard lithium-ion batteries, even in extreme job site conditions. The onboard fuel gauge helps you monitor the charge more accurately, so there’s less downtime on the job. REDLINK PLUS™ intelligence ensures maximum performance and protection from overload, overheating and over-discharge. The M12 FUEL 1/4" Hex two-speed Screwdriver’s optimized design results in superior speed for greater productivity on the jobsite. Its compact size allows users to work in tight spaces. The built-in LED worklight illuminates work area in dark work spots.