TUCSON, Ariz.--(BUSINESS WIRE)--The ac/dc adapter technology has evolved over the last years and presently the technologies developed by Rompower Energy Systems Inc. increase the efficiency from 88% ...

So I've tended to assume, possibly stupidly, that if a device relies on a USB power connection at all then any old AC->USB power adapter is fine to use for it and substitutable for a computer USB port ...

My wife has an iPhone 3GS and she's lost the AC charging adapter. I told her I thought all AC adapters for USB devices were equivalent (we have several others lying around the house). She is afraid of ...