Is there anything on the market right now, in one package, that will
work equally well in Europe and N. America? Maybe even do a bonus
quick charge?
Almost certainly there will be. I'm on the other side of the world so there's no point in quoting brands at large, although the Maha (PowerEx) products are highly regarded and should be available in your neck of the woods.
What you need to look for is a charger that has the following characteristics:
• A switchmode power supply -- either built-in or in the form of a plug-pack -- and commonly marketed with the description "switching power supply". These almost always will run directly from any AC mains voltage/frequency combination you'll find worldwide, and have the added advantage of being much lighter in weight than the traditional step-down transformer type. The term "travel charger" has become commonplace in describing these, in association with phones, shavers, etc. as well as digital photographic gear.
• A charge time of, say, 1 to 3 hours. A reasonably fast charge is regarded as optimal for NiMH cells -- better than slow charging over 12-24 hours, for example -- but the ultra rapid 15-minute type is probably better avoided.
• Multiple overcharge protection strategies, e.g. temperature as well as -dV charge termination sensing.
• Look for a charger with individual channels, or, at minimum, one which will allow you to charge groups of either 2 or 4 cells.
• A built-in discharge function can be useful, though you don't need it regularly for NiMH cells.
• These are commonly (though not always) sold bundled with a car cigarette lighter adapter -- more often in the case of the plug-pack systems -- which may be worth having as well. Just something for your check-list.
Here are some sites worth visiting. The first one has some links, towards the bottom of the page, to charger tests, though these were tending to crash the browser when I tried a few minutes ago (they normally work OK). The second is a mine of information on rechargeable batteries in general, though the company behind it caters more to the industrial sector and there's a LOT of reading to get through:
http://www.users.on.net/%7Emhains/Reviews.html
http://www.batteryuniversity.com/
http://www.powerstream.com/NiMH.htm
http://www.mahaenergy.com/store/Index.asp
--
Mike
Melbourne