Glamrock Freddy.

[Bernkastelll]

Glamrock Freddy

Glamrock Freddy, or simply Freddy. is the deuteragonist of the indie horror game Five Nights At Freddy's: Security Breach. He is the leading member and vocalist of the Glamrock animatronics and the main mascot of the band. Unlike his previous incarnations, he serves as the player's primary ally...

vsbattles.fandom.com

if I recall, he only has 1 hour of battery and need to charge again, why does he has self-sustenance and extremely high stamina?

 

[Newendigo]

"Due to being a robot" which is a extremely dumb explanation that has been used since forever.

Machines, rely on energy, too, and the use widely varies from lasting ages to a couple of hours