Cordless drills, impact drivers, grinders, saws, polishers, heat guns, rotary tools, work lights and the batteries and chargers that run them.
Voltage alone does not determine performance, but it is the number most listings are organized around. What actually matters is the battery platform: a bare tool in one system will not accept a battery from another, and the listing states whether a battery and charger are included.
Where a tool is brushless, that is noted. Brushless motors run cooler and last longer under sustained load, which matters for a grinder more than for a drill.
