Since the battery life is limited, and men's lives may depend on their functioning in an emergency, the lamps must never be unplugged by unauthorised persons.
Kuba ubomi be bhetri buncinci, kwaye ubemi babantu bungaxhomekeka ekusebenzeni kwazo kwixeshe likaxakeka, izibane akufunekanga zisuswe eplagini ngumnlu ongenamvume.