power supply
electronic device that converts or regulates electric energy and supplies it to a load
uninterruptible power supply
electrical device that uses batteries to prevent a power flow interruption
AC adapter
external, enclosed power supply that converts mains electricity for an appliance
emergency power system
independent backup source of electrical power that supports important electrical systems on loss of normal power supply
capacitive power supply
type of power supply using a capacitor
battery eliminator
dummy battery that supplies electricity from a connected external power source
switched-mode power supply
electronic power supply that incorporates a switching regulator
Electronic ballast
power supply for a fluorescent lamp