In the last one year, about four of my power supplies have failed, including the camera's and the wireless router's. Erratic electricity distribution in these areas could be the reason. One thing common between all the four power supplies was the that they were electronic. None of my transformer based power supplies have failed in the last many years. If any of the new electronic gadget that you are buying has an electronic power supply, just buy an equivalent universal power supply from the local electric store and use only that - it will keep your equipment safe from poor power regulation in this part of the world (read: India).
Now, how do you identify an electronic or a transformer based power supply? Just by the sheer weight and size of it. Electronic ones (SCR based) are light and small whereas transformer based ones are heavy and usually larger than their electronic counterparts.
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