Thinking of getting one of these myself...

From what I can make out, there isn't any clever circuitry in chargers for Lithiom Ion batteries/phones. They just provide current at a steady voltage. The clever stuff I assume therefor must be in the batteries/phones or not required.

So if someone can confirm this, then all that we need to check is that the quick knockoff charger hasn't got too high a voltage output. I assume the maximum current output should not matter as it's just a maximum.

So just need to check it with a voltmeter I guess.

Not an expert, so the above is not fact, asking for second opinions...

Zuber