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Probably not. USB ports accept both 110v and 220v. However, you need an adapter for U.S. plugs. Be sure the adapters are 220v compatible. I fried an Apple USB cube, though it said it was both 110 and 220v. Resistance devices, electric heating coils and hair dryers, may blow up if subjected to 220v current.I'm wondering if I'll need a converter?
Those solar chargers tend to be heavy and very sloooow at charging.you could buy a solar powered battery pack and charge your headlamp and other gadgets from this. Usb connectors are usually 5, 5 volt. That´s what I do with a lot of things I bring along...
OR you plug the battery pack into the sockets via small converters that you buy in the country you travel ie correct voltage and sockets. Then you charge gadgets on the go when needs be....for instance your mobile .
Anyone who is walking in the summer when they may want to start before dawn, so that they aren't walking during the hottest time of the day should probably bring a headlamp.I consider a headlamp a "might need".
Consider the following:
1. Why do you need it in the first place.
2. If you don't know your own person in the dark...well.
3. Are you carrying a smart phone? Has light of its own.
4. Head lamps are for dark nights. If it's that dark you should be asleep.
5. Now, think about it.
Anyone who is walking in the summer when they may want to start before dawn