Off-line switcher with battery reserve
Oilwell casing electrical power pick-off points
On-board emergency reporting apparatus and auxiliary battery...
Operation and construction of electric power systems using...
Optical power beaming to electrically powered devices
Optical power for electronic circuits using a single...
Optimization process of an accumulator battery charge, and...
Optimized power supply system for electronic circuit
Output-power control apparatus
Overdischarge and overvoltage protection circuit for a...
Overhead communicating device
Overhead power line monitor
Overvoltage protective circuit for hvdc terminal