[quote=@Unknown100]
Well, I was thinking, she mostly absorbed electrical energy, but discharged radiant energy. Maybe she could absorb all kinds of energy, but there is not much energy to be had in a rock falling or a bike driving, so she would mostly look for major sources of energy.
She would put her hand on an electrical outlet, charged up and blast beams from her hands.
However I also thought, she could create forcefields for protection. And... don't quite know the logical explanation for doing something like that.
[/quote]

I'm going for a semblence of realism, but also gotta remember this is superpowers, and a colony on mars in 2200. I'm not going to expect EXACT science. I think the I like is absorbing electrical energy, maybe later on we can explore other sources which probably require more thinking on how to store it (As what's the use if when you want to use your power you need to be plugged in? A walking battery is much better). 

But limits and all that can be worked on once we get CS' going.