0 used to describe machines, etc. that do not need an outside energy supply to work as they have their own source of energy:
They produce an intruder alarm system which is completely self-powered.
In those days, one could not do what one can now do with electric and diesel power, which is to slip a self-powered unit.
Tritium is not the only material that can be used for self-powered lighting.
Also, they are self-powered, usually by a diesel engine, and self-propelled.
Today, a four-wheeled self-powered vehicle, especially one designed to carry a small number of people, is generally known as an automobile or car.
Bales may be picked up from the field and stacked using a self-powered machine called a "bale stacker", "bale wagon" or "harobed".
Such a system typically operates in a cyclical or start/stop but ongoing and self-powered manner.
Mantrips may also be self-powered, for example by a diesel locomotive.
Because the repeater site is self-powered it is capable of handling emergency communications should the power or telecommunications network fail.
