redundant power supply
Technical computing term for a backup power supply unit that keeps a system running if the main power source fails.
The server is equipped with a redundant power supply to prepare for power outages.
冗長化 refers to the general concept of redundancy in systems, while 冗長電源 specifically denotes a redundant power supply unit.
Compound of 冗長 (redundant) and 電源 (power supply). The exact historical derivation is uncertain; the term is a modern technical coinage.