- 'will run for 28,000 years' and could go on sale by 2023

• The nuclear battery is 'safe for humans' as it is enclosed in tamper proof material
• It works by using microscopic diamonds to move heat from radioactive isotopes
• The radioactive isotopes come from the waste products of nuclear power 
• The company stacks multiples of these microscopic cells to generate electricity 

A battery powered by nuclear waste could keep a spaceship or hospital operating for 28,000 years without needing to be recharged or replaced, its developers claim. 

The radioactive battery is 'completely safe' for humans, according to California-based Nano Diamond Battery (NDB), who say it will 'change the world'. 

The firm hopes to start selling the battery to commercial partners, including space agencies for long duration missions, within the next two years. 

NDB are also working on a consumer version that could run a smartphone or electric car for up to a decade without requiring a charge. 

No details on pricing have been revealed by the technology startup, who say it is still in development phase. 

A battery powered by nuclear waste could keep a spaceship or hospital operating for 28,000 years without needing to be recharged or replaced, its developers claim