Here are a few ideas, depending on how powerful the character is (and/or how tolerant the GM is):
Lightning Strike: Flash vs. Sight and Hearing groups, Area Effect
Electrical Interference: Darkness vs. Radio group, Area Effect. This is great for disrupting communication among mooks and villains, especially if your own team has a Mind Linking telepath.
EMP: Drain/Suppress vs all electrical devices, Area Effect (maybe even Megascale). Potentially expensive and unbalancing, but super effective!
Data Manipulation: Telekinesis, only to perform Computer Programming, Security Systems, and similar skills, Invisible Power Effects. Allows the character to manipulate charges to rewrite hard drives and similar electronic media at a distance without anyone noticing.
And let's not forget that electrical charges in motion naturally create magnetic fields....