A nuclear-powered battery that lasts for 100 years and packs ten times the power of a traditional cell has been unveiled by Russian scientists.

The prototype consists of a semiconductor made from diamond, known as a Schottky diode, and a radioactive chemical that fuels it.

The technology could be used to power everything from permanent pacemakers that never need changing, to manned missions to Mars.

Scientists at Russia's Technological Institute for Superhard and Novel Carbon Materials in Moscow, insist the technology is safe for everyday use.

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