Or Fusion-Initiated Strength Turbocharger!
Not really. It's fists. GIANT METAL FISTS!
I have this mental image of a character with normal (for superhero comics, anyway) proportions wearing ABSOLUTELY MASSIVE! mechanical fists, maybe linked by cables or something to a backpack reactor or whatever and using a combat style that depends on the terrifying power of their GIGANTIC FISTS!
Using powers like
Smash! (punch thing)
Crush! (two fists come down on thing)
Turbo Uppercut! (punch enemy upward)
Plasma Shockwave! (conical energy blast with chance to set people on fire)
Rend The Earth! (damage and knockdown from hitting the ground real hard)
Go For Distance! (punch with windup and heavy knockback)
Atomic Fist! (punch with knockdown and temporary radiation debuff aura on target)
And stuff. Is this even remotely feasible? Hecked if I know, probably not, but I had the idea and I had to put it somewhere.