Without doubt quick chargers supplied by 12 V input voltage are by far the most seen at our flight sites. Common practice is often to recharge LiPo flight packs directly from the car battery by laying them on the engine itself or body panels, which brings a massive danger of producing short circuits and damage. You will know that the body of a car is not free from potential and is electrically connected to the negative pole of the car battery. All it needs is for a LiPo battery (or even the complete charger with its leads!) to fall inside the engine compartment, whereby it could short out and cause a major problem.
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