Hi,
my Nokia adaptor died last week. Now I would like to cut the usb-connector off the adaptor and connect it to another one with the same voltage. Problem is the polarity of the usb-connector. It is too small to get the probes of a voltmeter in it, cutting it open is self-defeating and the old adapter of course is kaputt.

Two questions: can it hurt the nokia if I just try it and get it wrong first time? If so, are there other tricks or heuristics I can use? Color of the leads?

Paai