These Taos Indians live in the ancient adobe rooms as their ancestors did centuries ago -- without any running water or electric power for lights.

VOA: special.2010.07.05

Aggreko kept its power running throughout the event - despite an outage which hit the Superdome stadium's lights.

BBC: Super Bowl: Power firm Aggreko 'not affected' by outage

The secure element doesn't necessarily need to have power running through it or to be in the midst of near-field communication in order to yield up its cryptographic key to a clever intruder who has sufficient time and sufficient desire to breach the security of a smartphone, bank card or national border.

ENGADGET

Finally, a 1 kW electric radioisotope power supply running on Plutonium 238 (Pu-238) would kick in to power an ion thruster engine.

FORBES: Jump-Starting A Mission To Interstellar Space