A compact, lightweight cordless impact driver with comfortable composite housing and soft grip to reduce vibration. It includes a variable speed control trigger with lock function which gives more control during application. Also included are an integrated LED battery level indicator and LED work light as well as a belt hook for safer storage while not in use. The Li-ion batteries give an all-round better performance than standard Ni-Cd/Ni-MH cells. They maintain a higher energy density level (generally twice that of a Ni-Cd cell) giving more battery power per gram. This unit has a flat discharge curve – performing better for longer. There is also no memory effect meaning these batteries can recover from a deep discharge with no tendency to reduce overall capacity.