This might be a stupid question, but I can't seem to find a straight answer online, so I thought I'd ask you wise folks. I'm looking to buy a multi-USB outlet charger for both domestic (US) and international travel. The electronics I travel with are all charge-able via USB ports and this seems like a great way to save space and weight in my luggage. My current multi-plug outlet adapter requires me to bring the larger pronged part of all my chargers instead of just the USB cables. (Sorry I don't know the technical names of these things, hopefully this makes sense.)
The devices I use are all dual voltage (cell phone, camera battery charger, and e-reader) thus I have never purchased a converter. My stupid question is this: since the words "dual voltage" are printed on the part of the chargers I would now leaving at home, does that mean that I would now need a converter to use with my multi-USB outlet? I'm just not sure if it is that part of the charger that makes the devices dual voltage, or if the devices themselves are dual voltage.
Also, if anyone wants to recommend a good multi-USB outlet that they've successfully used, I'm definitely open to suggestions. I've seen a few on Amazon that include adapters for various countries, but I always appreciate recommendations. Thanks!