The most recent idea of air transport: Worried about the risk induced by a battery when it is heated or if it short-circuit itself out of nothing more than thin air, some airline companies (e.g. Air India) had already imposed a rule prohibiting all batteries from checked luggage (you had to put them in cabin luggage).
This is now an official proposal from the US Administration to make this globally compulsory. In a few months, we may see the prohibition from checked luggage of any gear containing a battery (photo or video camera, laptop, smartphone, etc.)
Of course, I would never advise you to leave anything of value in checked luggage (too much risk of theft or violent handling). This may make things clear and simple: All cameras go in cabin!