What takes place when electrical power heads out suddenly impacting electronic-lock functionality? Having backup keys concealed

http://businessdirectoryslotenmakersbmmt153.theburnward.com/slotenmakers-en-slimme-technologie-een-nieuwe-era-van-veiligheid

What takes place when energy heads out all of a sudden affecting electronic-lock performance? Having actually back-up tricks concealed tightly gives peace-of-mind recognizing choices exist throughout emergency