Tyrwas

You've been...THUNDERSTRUCK!

Tyrwas is the name of a god of the sky worshipped by wizards in ancient Britain on the planet Earth, such as Beorht.

Leaving aside control of thunder, lightning, rain, and clouds, Tyrwas also appears to be responsible for recharging metal knights who, in 543 A.D., lack a suitable power socket into which they can plug themselves. A Decepticon Raider in King Arthur's Court

Notes

• Tyrwas seems to be based on Tîwaz, the Norse god of combat and glorious victory from whom we get the English word "Tuesday".