Viewers of the prequel trilogy will have noticed that young Darth Vader, aka Anakin Skywalker, had a true gift with tech and gadgets, building his own pod racer and even C-3PO. There's a grim irony to Anakin's later reliance on technologically advanced armor to sustain him, as seen in the original three films (which, along with the prequels, TV series Star Wars Rebels, and the Darth Vader: A 3-D Reconstruction Log, will be our sole points of reference).
Even as Anakin slowly turned to the Dark Side, letting his emotions control him, his reliance on machines only increased. When he lost a hand to Count Dooku in Star Wars: Attack of the Clones, he replaced it with a cybernetic limb. His ultimate reliance on machine technology would come after Obi-Wan and Anakin came to blows at the end of Star Wars: Revenge of the Sith, leaving Anakin scarred, crippled, and close to death on the fiery surface of the planet Mustafar.
Anakin was saved by Palpatine's medical droids, though not before enduring intense pain, leaving him three fewer limbs to boot. With no original limbs at that point, and his entire body covered in burns and scars, it would have taken a miracle to keep him alive. Unfortunately for Anakin, it was less a miracle and more a walking iron lung that allowed him to still live.
That imposing black-clad armor that creates such a striking visual in the movies is actually a mechanic mobile life support system that would allow him to continue on to be the scourge of the galaxy.