If you hose down your motorbike when washing it, it is important that the charger is protected from water. The Quad Lock charger has IP66 certification, which means that it is resistant to strong water jets. However, it is advisable not to hold the device directly under water or expose it to strong water pressure.
The charger must always be moved so that the USB socket points downwards. Otherwise, the water cannot drain off and penetrates the inside of the charger, which will sooner or later lead to failure.
No, the charger does not have a switch. I have connected the charger directly to the battery and have not noticed anything negative so far. After two months of "hibernation" it started up without any problems, so you can connect it without hesitation. You can still charge it when the engine is switched off, but I wouldn't overdo it.