secondary power; backup power supply
Technical computing term for a secondary or backup power source, often in the context of servers, data centers, or electronic devices.
Secondary power is secured in the server room.
If the backup power supply fails, the system will shut down.
予備電源 is a more general term for backup power, while 副電力 is specifically a secondary power supply in a computing context.
Compound of 副 (ふく, 'secondary, auxiliary') and 電力 (でんりょく, 'electric power').