>>A UPS is a fairly simple device. It's just a battery that keeps itself charged while plugged in and then gives power when not plugged in (or power goes out). Its purpose is to give you the time for an orderly shutdown when power goes out.
>>
>>I don't see how a UPS could "backfire."
>>
>>Tamar
>
>There are some really crappy UPS manufacturers out there, such as American CyberPower. It's not fun when the lights go out and your UPS doesn't do *anything*.

I believe that is the safest way of knowing the UPS is dead rather than having dead computers with faulty UPS ...