I hope that's the right term for them.
What I'm talking about is the little adaptors that you shove into a power outlet and out comes 12V DC 350mA etc.
I have a couple of cordless phones that use 9V DC 500mA adapters, and the phone seems to not be charging as it should. I've replaced the rechargeable battery so I know it's not that causing the problem, and it's still not charging sat in the cradle.
Next I thought to check the output of the adaptors. So I got my meter on it and expected to see about 9V show up. However, of the three 9V adaptors that I have, I get 12V, 14V and almost 20V.
Would I expect to see 9V out of a 9V adaptor? No laughing now, I'm serious
Cheers