Purchasing a flashlight for emergencies is not a simple matter. The most important consideration is to choose one that fits the need. There are different situations in which the emergency flashlight is useful. Penlights are handheld and useful in focusing light in small dark spaces. Headlamps are useful when it is important to leave the user’s hands free.

Aside from the design, emergency flashlights also use different technologies in the matter of power source. The most common power sources for flashlights are different kinds of batteries. The choice of battery is usually determined by the size and shape of the flashlight. There are also mechanically powered flashlights that use electromagnetic induction. An example is the kind of flashlight that you shake before use. These are useful when power is not available.