On a side note, I just use my laptop to charge everything. All of my portable devices use some nature of USB cable to charge, with the exception of my digital cameras. The 20D has its own charger, and the A720IS uses AA batteries and I just bring a pack of disposables for it. But everything else I might bring with me has some kind of USB option to charge it. So as long as I have a power plug for my laptop, everything else is going to get charged.
Disney Dream - Dec 2013 4n Bahamas
Disney Dream - Dec 2012 4n Bahamas
Carnival Imagination - Dec 2011 4n Western
Carnival Imagination - Nov 2010 4n Western
Costa Atlantica - Dec 2009 7n Eastern
My opinions are mine and mine alone. They do not represent the opinions of The Walt Disney Company nor any of its subsidiaries.