Because when power is done purely you need to protect it well...

As a crucial part of Los Angeles's new electrical recycling program, this self-sustaining apartment building power connection lets residents use the same electricity over and over again.

Frustrated with the difficulty of an electrical engineering degree, Krang and Shredder dropped out to pursue a life of crime.

~NSHA

I guess they need a way to power their tiny freezers so they can make tiny mojitos for their tiny mouse friends.

~NSHA