While this doesn't fall into the consumer device catagory we have one industrial product that we try to work on, that has a soldered battery, Desoldering the old battry is easy but installing the new one often destroys the equipment. This product is designed to run continuously so there is no power switch. This means that the final battery connection must be made cleanly (like a switch) and then soldered without disturbing the connection. Any disconnect/connect made during soldering caused the onboard processor to hang/crash and the unit becomes a dead box.
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