Before RoboCop, there was . . . 8 Man!
8 Man was an anime and manga series from the early 1960s. The premise is that Japanese police detective Yokoda was murdered by criminals. A brilliant scientist named Tani took his body and turned it into an android using an experimental process. That process had failed on 7 previous attempts. But on the eighth attempt, Tani was successful. Now Yokoda maintains a double life as a private detective and a cyborg superhero named 8 Man.
Whenever Yokoda was depleted of energy, he could resupply by puffing on special cigarette-shaped tubes developed by Professor Tani. These were filled with radioactive isotopes—just the kick he needs to keep on fighting crime.
-via VA Viper