SRI International, a Silicon Valley research firm, received $4.7 million to make a battery for the Department of Defense that will be unrecognizable to the human when it is activated according to USA Today. The battery is called SPECTRE or Stressed Pillar-Engineered CMOS Technology Readied for Evanescence.
According to the project notes on FBO.gov, the SPECTRE silicon/air battery “is a fully transient power supply that, when triggered, becomes unobservable to the human eye”. The purpose of the project is to develop and build a silicon/air battery that is a realistic, deployable. and self-destructing power supply.