Sign up to our free weekly IndyTech newsletter delivered straight to your inboxSign up to our free IndyTech newsletterA Chinese startup has unveiled a new battery that it claims can generate electricity for 50 years with the need for charging or maintenance.Beijing-based Betavolt said its nuclear battery is the first in the world to realise the miniaturisation of atomic energy, placing 63 nuclear isotopes into a module smaller than a coin.The company said the next-generation battery had already ...