What is the difference between hybrid and plug-in hybrid?

But what are the differences between hybrid and plug-in hybrid cars? Starting with Mhev (Mild Hybrid Electric Vehicle) systems, often christened 'mild hybrids', are the first step in electrification. Although there is no difference in type approval, Mild Hybrid versions have a parallel electric system, powered by 12 or 48 volt batteries working together with a small electric motor. The second step in electrification sees the presence of Hev (Hybrid Electric Vehicle) models, increasingly christened full hybrids, where the electric motor works together with the Ice (Internal Combustion Engine) and is able to travel 100 per cent in electric mode for more kilometres than 48-volt mild hybrids. The electric motor contributes more to lower fuel consumption and emissions than Mhev systems, but it takes up more space and involves higher costs and weight. The batteries are recharged during braking and thanks to the presence of the heat engine, while there is no power outlet that can connect to charging stations.