Adapter plugs; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electric current; Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; Battery performance monitors; Chargers for batteries; Current converters; Current transformers; Electric current control devices; Electric plugs; Electric power converters; Electric sockets; Electric current switches; Electrical adapters; Electrical controllers; Electrical outlets; Electrical plug device enabling connection and disconnection of power and/or control cables; Electrical transformers; Electronic controllers for use with power converters; Electronic controllers used to reduce power consumption; Electronic devices for measuring electric current; Electronic monitors and monitor modules for monitoring electric current and electrical signals; Monitoring devices for monitoring battery performance characteristics; Power adapters; Power supplies; Power supply connectors and adaptors for use with portable electronic devices; Switches, electric; Terminals for batteries; Time switches, automatic; Voltage testers; Converters for electric plugs; Voltage stabilizing power supply; voltage, amperage, continuity and battery life testers