Battery tools

For screwdriving and assembly, review how to choose a cordless screwdriver; for larger fasteners and automotive work, how to choose a cordless impact wrench; for concrete and masonry, how to choose a cordless rotary hammer; for metal cutting or grinding, how to choose a cordless angle grinder; and for straight cuts in wood, how to choose a cordless circular saw.

Voltage is tied to the tool class and the level of load the system is intended to handle. Compare cordless tool voltage (V) so you do not choose a system that is too light or unnecessarily heavy for the job.

Amp-hours (Ah) affect runtime and usually battery size and weight. For a balanced choice, see battery capacity (Ah).

Check battery and charger compatibility before choosing a tool. See how to choose a battery and charger and what is a unified battery platform, especially if you plan to use several tools on one battery platform.

Motor design can affect operating characteristics and maintenance needs. Compare brushed and brushless motor and choose the type that fits the workload.

For screwdrivers and impact wrenches, torque (N·m) is a key specification. Match it to fastener size, material and the type of work.

Consider the tool safety systems, correct accessory installation and battery condition. tool safety systems and their purpose covers general principles, while how to use cordless tools safely focuses on cordless-tool use.