Woke up this morning to a loud, constant beep emanating from the office. My nice APC UPS was informing me it was overloaded, so I reset it and everything was fine. Until a few minutes later when the same thing happened.
Reset. A few seconds. Overload.
Fine, I unplugged everything. Reset. Instant overload. Unplugged it from wall. Same thing.
Decided unit was tits up, and removed the internal batteries.
Hooray for expensive, broken stuff!