Do some usb power adapters supply 6.5 volts?
I took a 12 volt usb car usb adapter apart and wired it to a switch and a panel mounted female usb plug. The power supply is outputting 6.5 volts. This has me worried because I thought USB power was always 5 volts. Maybe once I plug something into it the voltage will automatically change to a the right voltage and current required by the device.
Also, this adapter says it is only compatible with Iphones. Does that mean anything else usb powered would not work?
this is the adapter