<P> Early cordless drills used interchangeable 7.2 V battery packs . Over the years battery voltages have increased, with 18 V drills being most common, but higher voltages are available, such as 24 V, 28 V, and 36 V . This allows these tools to produce as much torque as some corded drills . </P> <P> Common battery types of are nickel - cadmium (NiCd) batteries and lithium - ion batteries, with each holding about half the market share . NiCd batteries have been around longer, so they are less expensive (their main advantage), but have more disadvantages compared to lithium - ion batteries . NiCd disadvantages are limited life, self - discharging, environment problems upon disposal, and eventually internally short circuiting due to dendrite growth . Lithium - ion batteries are becoming more common because of their short charging time, longer life, absence of memory effect, and low weight . Instead of charging a tool for an hour to get 20 minutes of use, 20 minutes of charge can run the tool for an hour . Lithium - ion batteries also hold a charge for a significantly longer time than nickel - cadmium batteries, about two years if not used, vs. 1 to 4 months for a nickel - cadmium battery . </P> <P> A drill press (also known as a pedestal drill, pillar drill, or bench drill) is a fixed style of drill that may be mounted on a stand or bolted to the floor or workbench . Portable models with a magnetic base grip the steel workpieces they drill . A drill press consists of a base, column (or pillar), table, spindle (or quill), and drill head, usually driven by an induction motor . The head has a set of handles (usually 3) radiating from a central hub that, when turned, move the spindle and chuck vertically, parallel to the axis of the column . The drill press is typically measured in terms of swing . Swing is defined as twice the throat distance, which is the distance from the center of the spindle to the closest edge of the pillar . For example, a 16 - inch (410 mm) drill press has an 8 - inch (200 mm) throat distance . </P> <P> A drill press has a number of advantages over a hand - held drill: </P>

What is a bench drill press used for