Usually, the only thing that breaks down in emergency lights are the batteries. These units are plugged-in 24/7 and the batteries are pretty much trickle-charged indefinitely. It is safe to assume that the batteries are relatively over-charged all the time so it stands to reason that the batteries will get used up or experience wear and tear whether or not the emergency light was used or not. Parang auto insurance or HMO... you pay for the premium whether or not you make a claim.
It's actually a necessity to check the condition of the batteries every month (ie. unplug it and see if it can provide lighting for at least 30 minutes) and replace the same when they've been degraded.





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