Three side handle positions for optimal grip in all applications KEEPCOOL™: The patented battery cooling technology that ensures up to 25% longer run time and 2x the lifetime Overload protection protects the motor ACTIVCELL™: Patented intelligent battery and tool interaction, for maximum performance and battery protection Safety guard with 'Clic' system can be adjusted to every working situation in seconds Soft start for gradual run-up to maximum speed without kickback Side handle with 'VRS+': A unique and superior vibration reduction system PWRCORE 20™: Industry-leading advanced battery technology, to power all SKIL '20V Max' tools SKIL 'XP': Exceptional performance through high specifications, advanced brushless motor and industry-leading battery technology 'PWRASSIST™': The USB adapter enables charging of mobile devices on the go Digital brushless motor: More power, more efficiency and 10x longer lifetime When attaching a battery with the switch in on-position, restart protection ensures that the tool does not start automatically Automatic 'PWRJUMP™': Charges from 0% to 15% in the first 5 minutes (4.0Ah battery / 100% in 50 min.) Spindle lock for easy accessory change Lithium-Ion technology: no memory effect, no self-discharge and always ready for use Anti-slip soft grip for more user comfort.