An electrosurgical instrument comprises a handpiece, a monopolar electrode unit having a single treatment electrode projecting from the handpiece, a radio-frequency generator and a battery within the handpiece for powering the generator. The generator has a single direct radio-frequency output patient...http://www.google.ca/patents/US6039734?utm_source=gb-gplus-sharePatent US6039734 - Electrosurgical hand-held battery-operated instrument
