That's an interesting, if slightly overpowered concept. I'd say limit it to one field and you'd have a very nice tinker power
You mean slightly overpowered in the sense of The Siberian?
And yeah, it it's not meant to be electrical storms, you just buff up the gear of other tinkers basically. It would revert after a while, but in the meantime, you are the perfect assistant to Dragon. The other part of the power would probably be considered Thinker; you hack into anything with an operating system(and in a lot of cases, if it didn't have an operating system before you upgraded it, it probably does now) and rewrite the code how you like. Typically, this means it obeys you, though it could just be to insert a virus, though he wouldn't be all that great at virus creation, and while hacking could be possibly vulnerable to viruses. Basically he goes into the machine. But yeah, technopathy would probably be the best way to describe it.
I'm thinking the name Upload if they're a hero, and possibly Terminal(Upload works great for Hero or Villain, really) for a villain. Most dangerous in concert with more conventional tinkers. Oh, Dragon has a new suit? That definitely needs to get bigger. Bakuda created a fancy new bomb? Let's make it's blast radius five times the size(though he'd have some trouble ensuring he escaped, too...). Combined with the on-touch hacking(he has to touch it, so no ranged fancy pants shit), he's more or less the ultimate tinker ally and counter.
...Now I have to image "Summon Bigger Truck", though.
The main concepts I have for capes are Upload, Scarlet/Crimson(blood based powers, yayyyyy), and...that's more or less it, at the moment. I was thinking someone with very general control over or the ability to communicate with natural phenomena, whether it be storms, trees, or animals, named Druid, but there's already Taproot so...