SunZi 4-Volt Lithium-Ion Screw Driver, Drill, Multi-Cutter, with 6" Flex Extension Lithium Ion Powered. Lithium Ion enables long runtimes and fade-free power. Lithium Ion batteries will also offer long battery life and long storage life (4x Ni-Cad). Pistol Grip or In-Line Use for any Hard to Reach Angle or Position 1/4" Collet with Magnetic Bit Holder LED Battery Indicator Light LED Worklight