Telegraph: Chinese companies, such as BYD, have been lauded for developing advanced batteries that could power a revolution in motoring. BYD, a former battery maker, was the first company in the world to start selling a heavily-electrified hybrid car last December, easily beating larger rivals such as Toyota to the market. As a result, Warren Buffett, the US investment manager who runs Berkshire Hathaway, bought 10pc of BYD last December for $230m (£158m). The Chinese government …