I have a server (Dell R310) running which has a main power cable (long) connected to power(in the wall). Anyone who is bored will pull out that cable (Train station/Airport/ Public zone) and server goes down. Again and again that's happening (specially construction guys/morning cleaner doing this, while moving the equipment from one point to another).
Is there any hardware cheap/medium/expensive which can on power-off least 2 or 20 or 30 minutes and when its battery is almost flat, it triggers to my server $init 0 or something similar?