Answer:
They can get energy to their devices through natural sources of energy like the sun and wind.
Step-by-step explanation:
When rescue workers are involved in missions, especially those that involve natural disasters, this could limit or totally eliminate their access to energy from electricity grid lines. When this occurs, they can still make use of the natural sources of energy around them, to power up their devices.
Some of these sources of energy include solar energy and wind energy. These natural sources have been known to power up some batteries. So the rescue workers can utilize them to get energy to their electrical devices.