Rory Cellan-Jones
Technology correspondent
@BBCRoryCJon Twitter

Publishedduration28 minutes agoimage copyrightGetty Images

This week, the UK government announced that sales of new petrol and diesel cars will be banned from 2030 – just one signal among many around the world that a major shift to low-carbon motoring is under way.

In practice, that means millions of people are going to have to be persuaded to choose an electric car – and on this week's Tech Tent we explore how improvements in battery technology can make that happen.