For me it has destroyed by a fast descent the Smartfon by overvoltage.
Cause seems to be that the Revolt Dynamo charger uses a completely undersized Zener diode for voltage limiting and these blows, if you use the charger during a fast descent.
As a result, then land voltages from 12-25 volts to the USB connector and thus also on Smartfon what destroyed this.
In addition, one should remember that the Revolt Dynamo charger is not even subject to water, which in the case of rainy weather leads specifically, that the dynamo supplies a downright drowned charging electronic current.
