Thanks; simultaneously with your message, this was received from Amazon--within 1 hour after asking the question under "Help".!! Good for Amazon!!!
"Yes, you can charge the Kindle Fire using the USB charging cable.
The Kindle power adapter supports voltages 100V-240V. If you are outside of the U.S. and choose to use a local plug adapter, make sure the plug adapter is compatible with the Kindle USB charging cable and follow all safety instructions.
Actual charging time may vary. If you'd like to learn more about the power adapter options, you can visit these pages:
Europe:
www.amazon.com/gp/product/B002Y27P5K
For specific information on charging Kindle models outside of the United States, please refer to our Help pages:
www.amazon.com/kindlecharge
Thanks for your interest in Kindle."
It therefore seems, thanks to all this info, that I can as easily charge elsewhere as in the U.S. All I or anyone needs is a plug/socket adapter.
kdoc