Scavenging energy to run devices.

In Brain Technology by Brainy Days Ahead

Engineers from the University of Cambridge create a new ultra-low-power transistor that can function for months or even years without a battery by ‘scavenging’ energy from the environment. Using a similar principle to a computer in sleep mode, the transistor harnesses a tiny ‘leakage’ of electrical current, known as a near-off-state current, for its operations. “If we were to draw energy from a typical AA battery based on this design, it would last for a billion years.”