1) Battery-powered 2) Conductor 3) Lacking a cord 4) Like some shavers and phones 5) No electric cable needed 6) Not having a cord 7) Telephony equipment 
The term cordless is generally used to refer to electrical or electronic devices that are powered by a battery or battery pack and can operate without a power cord or cable attached to a fixed electricity supply such as an outlet, generator, or other centralized power source, allowing greater mobility. The development of more powerful rechargeable...
[adj] - not having a cord
adjective not having a cord; `cordless telephone`
lacking a cord. · (of an electrical appliance) requiring no wire leading to an external source of electricity because of a self-contained, often rechargeable, power supply; battery-powered.