Glossary
Original editorial content, made for people who want to understand before they buy.
Grip
The grip is the part of the machine held in the hand. It can be built into the body or interchangeable, and varies in material, diameter and surface. In systems with separate grips it can be a disposable or reusable component.
Battery
In wireless machines the battery is the rechargeable accumulator that powers the motor, generally lithium-ion. It can be built in or removable, and on models with several batteries the empty one can be swapped.
Runtime
Runtime is how long the machine works on a full charge. The figure in product sheets is declared by the manufacturer and refers to specific conditions (set voltage, load, temperature): in real use it can differ.
Power Supply
The power supply is the device that provides electrical energy to a corded machine, usually with adjustable voltage. It connects to the machine with a cord and a connector (for example RCA) and may include features such as a voltage display or a foot pedal.