I Have The Power!

About this image

What is this?!
A piece of junk I see.
Oh no 'tis not
Could be of much use to me!

A layer of rust
But still sturdy and strong.
A power core needed,
To make it run for long.

'Tis just a smidgen of trouble for me,
Nothing less or nothing more!
A wanderer has many trinkets 
Alas though, I carry not a power core!