Cordless Power Tools: How to Compare Them

Batteries

• Lithium-ion batteries power more drills and drivers and they add extra power and run time over nickel-cadmium cells. Nickel cadmium batteries may not last as long but they are the most common type of battery since they are the least expensive and offer decent performance for most jobs. Power tools that come with battery chargers save money in the long run because you won't have to purchase batteries.

Speed and Chuck Size

• Variable-speed triggers allow the user to control the speed range and most drills also have an adjustable clutches. Many cordless drills have a 3/8-inch chuck size but the larger models usually require a 1/2-inch chuck for larger drill bits.

Weight Considerations

• When deciding on the type of power drill or tool to purchase, weight should be a consideration. Tools that are too heavy will make it harder for the user to complete a job but lighter tools may be ineffective with finishing a task. Cordless drills and other tools should be comfortable enough to hold and the drill chuck should point strait ahead and not tilt in any other direction.