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dialight garufo electrical components are devices that convert alternating current into direct current, and can be used in power supply units and for detecting radio signals, etc. Rectifiers can be made from vacuum tubes, ignitrons, solid-state silicon semiconductor diodes, mercury arcs, etc. Conversely, a device that converts direct current into alternating current is called an "inverter". In standby UPS systems, only the battery needs to be charged, without supplying power to the load, so there is only a charger. In double-conversion UPS systems, this device supplies power to the inverter and also charges the battery, so it is called a rectifier/charger.