Q: What happens when a hybrid car runs out of battery power?
A: This sounds like a reasonably simple question, but in fact, it’s all pretty complicated. That obvious answer, of course, is that, when a hybrid’s batteries are flat, the petrol engine starts up and continues to drive the vehicle while also offering up some charge to the flat battery. Fair enough, and that’s precisely how most hybrids work.
The complications set in when you consider that there are two types of…
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