Whether it’s self-charging or a plug-in – all hybrids run on their petrol or diesel engines even if the battery is depleted. That means if you’re unsure where to charge a hybrid car while travelling, you won’t be stuck when the battery runs dry.
In contrast, running out of fuel will affect hybrids differently. If driving a self-charging mild hybrid, you will not be able to drive without fuel. In a full hybrid you will come to a stop after a short distance, typically 0.6 miles or so - as the battery holds a small amount of charge. But, in a plug-in, you will be able to run on electric power longer, with a typical range of 19 miles to 50 miles if fully charged.