I don't think he means using the charger itself, just it's power supply(Wall Wart)
But agree it's risky, as mentioned the supply could be badly regulated, not regulated at all(tho most scopes would probably have supply conditioning built in), or even have AC output(tho not likely, I have a couple)
Also check the polarity of the plug and socket match, some are positive tip, some negative tip.
Agree, look for a good Switch-Mode supply, but before spending around $40 at Jaycar for a new one, check your local second hand stores like pawnbrokers(Cashies etc) or Good Sammies, Salvo's, the weekend cash-n-carry/car boot sales, garage sales or whatever, you can usually find a suitable ex-mobile phone or laptop supply for only a few dollars.
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