specific question about charging my phone

Samantha, Based on the information you've posted, your Phone Charger is capable of "world operation", so you'll only need appropriate Plug Adapters to use it in Europe. The "output" is the voltage and current delivered to your phone (these are typical USB specifications). I'm not entirely clear on "My charger has a usb cord that plugs into a wall attachment" or "My outlet adapter has a usb input"? Could you provide further information on these products? I suspect that your outlet adapter has a USB output. NO, your Phone can NOT use 100-240 VAC! DO NOT try to connect the phone directly to a power point, as the result will be an instant display of sparks and smoke along with the charred remains of your phone. There's a good reason that the phone information states that the user should ONLY use approved Chargers. The function of the Charger is to reduce line voltage (100-240 VAC) and convert this to a DC voltage of the correct value (5V) for the phone. It would help to know which cellular network you use. Are you planning to only use the phone on Wi-Fi, or will you need to make calls or send texts as well? Happy travels!

IF I understand, you need the charger that plugs into the wall outlet via an adapter so that the US to flat prongs are convert to the European round prongs. It is ok for the 240 voltage. What would you plug your usb cord into if you did not bring the charger?

My outlet adapter has a place to plug in a usb cord

I'm not sure I understand all the parts you have, but this is what you need (working your way from the phone to the wall outlet): (1) Phone, connects to, (2) a cord that goes to a device that plugs into the wall , and the device needs, (3) an adapter that allows your US plug to go into a Europe wall socket. It may be your phone needs all of the things you listed. My iPhone only needs a USB cord and wall plug with adapter. Note: you'll need two adapters - a three-pronged one for London and a two round-pronged one for the rest of Europe.

Just lurking, but Ken I appreciate your explanation of the function of the phone charger. I dont ever want my phone to go poof!

Samantha, the nice thing about USB charging that most newer phones employ is that you can use the smallest charger you can find that meets the current requirements. For international travel that is 100-240v, 50-60 Hz, and output of 5V - 1A. The output can vary from the 5V, but the standard charge for a USB power outlet is 5V. The smallest one I have found is one that came with my Kindle from Amazon (2nd generation, I think). It is little bigger than a power plug itself. When I travel, though, I usually use one that I bought at Walmart that has two USB slots so I can charge two things at once. So if you're trying to save space (and weight), try and find a small one. You can safely use it instead of the one that came with your phone so long as it has the specs listed above.

Be very carefully with third party charges. My son misplaced his Apple iphone charger so bought a cheap one from Amazon. It looked identical to his original iphone charger EXCEPT the input read 120v. Which probably explains why it was so cheap.

Ken You pretty much answered my question. I was wondering if the charger did anything to protect the phone or basically just connected it to the wall. But, here is my phone charger: http://www.amazon.com/gp/aw/d/B004JK481Y/ref=mp_s_a_1?qid=1332033080&sr=8-1 And here is my outlet adapter:
http://www.amazon.com/gp/aw/d/B001GGGBFK/ref=aw_d_detail?pd=1&qid=1332033316&sr=8-18 As you can see, the usb cord on the charger disconnects from the part that plugs into the wall, so I was hoping to plug it into the usb port on the outlet adapter. However, the outlet adapter is not a converter so I assume I will have to being the wall attachment of my charger, which is really not a big deal I suppose.

Samantha, I would say that the adapter alone would work because it is also a charger. In other words, it is a charger like the one you normally use. The difference is that it also has built-in the right plug pins to use in the U.K. and Europe, so it is an adapter as well. I would say this but for one of the user's comments on the amazon site. That user writes that on at least one of the chargers did not work with some USB-charging devices. You'd have to be sure to get the right one. I think you may have, but I'm not sure. If it charges your phone in the U.S., then you're okay. You can take it alone (with the cord, of course). You've already got the adapter/charger, so there is no point to the advice that follows. But if others are thinking of taking this approach, I'd say just stick with your normal phone charger and get a couple of the plug adapters that converts a 2-prong U.S.-style plug to the ones needed in the U.K. and Europe (each is different). I say that because Amazon lists the adapter/charger unit as costing a lot. The plug-only adapters are pretty lightweight and should be much less costly.

Samantha, Thanks for the additional information. It appears that your "outlet adapter" has a USB output rather than an input. I have several concerns regarding the "outlet adapter", especially in light of this Review - tiny.cc/boqcbw Granted, this is only one user's experience, but it could be indicative of potential problems. Having two of these devices fail when used on 230 VAC electrical systems seems more than coincidental. According to the link you provided, the outlet adapter features a "built-in surges and spikes protection system". That raised some "red flags" as soon as I read it. It's relatively easy to design spike and surge protection for a particular and somewhat narrow voltage range, but IMO it would be very difficult to design something like that to cover a voltage range of 100-240 VAC (especially in a product that size). The "clamping voltage" would have to be configured for the highest value, which would provide no protection at the lowest value. It's a bit difficult to explain the technical details, but I suspect this is why the device mentioned in the above review "self destructed" when used in 230 VAC countries. Regarding the "outlet adapter", I'd be reluctant to use it on 230 VAC, and would prefer simple Plug Adapters. They're cheap and light and I always pack at least two of each type (always good to have a backup). Bottom line - I'd recommend packing your phone charger along. It's not large or heavy so shouldn't be a problem to travel with, but you will have to "keep track of it". Good luck and happy travels!

Ken has "pipped me to the post" with advice that is very similar to what I would have noted had not flying fingers Ken beaten me to it. Samanta, you would be well advised to follow that advice...