When a UAV runs out of energy, militaries lose a vital surveillance asset that does not cost just money, but lives. That is why many companies are constantly looking at improving battery and power technology, especially when it comes to getting more for less. It is often said that the only thing that limits the use of an unmanned vehicle is the operator's imagination. With both the military and commercial markets increasing their use of such platforms in all domains and finding new ways to utilise their robotic assets, it is hard to argue with such a statement.
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