I have a number of Arduino projects which I power by 5volt single-way USB chargers and a powered USB hub. These work OK but I am now wanting to replace the powered USB hub with a multi-way USB charger. Now, I have come across "intelligent" chargers such as this:
Which appear to be able to ramp up the voltage on demand on demand (depending perhaps on which socket you use on the charger) an now I am uncertain if this poses a risk for the 5 volt Arduino. I guess by default, the charger provides a maximum of 5 volts, however, it can test the appliance being charged to see if it requests a higher voltage. My concern is that a simple failure may cause an overvoltage. Has anyone experience of these ?
It appears, incidentally, difficult to find multi-way chargers which don't support this higher voltage feature.