cordless drill is a very common tool found in most garages and workshops.
Unlike corded electric drills or air powered
drills which both require a connection to an immovable power
source, cordless drills can be carried almost anywhere.
Cordless drills rely on heavy-duty rechargeable batteries for power.
The power levels for cordless drills can vary immensely and most
manufacturers have their own design for the rechargeable batteries
meaning they can usually only be used with their drills.