I've got several devices with a mini-B USB receptacle - including my mobile phone/PDA and some headsets. Each came with its own AC adapter. I'm wondering if I can charge any of these devices from any charger with a mini-B USB plug - (1) AC adapter (2) car charger (3) computer USB port with A-to-mini-B cable.
With wall warts I know you've got to match voltage, polarity, DC plug, and the charger must supply enough amps to power the device. But if the charger has a mini-B USB plug, does that take car of the voltage (+5V) and polarity?