Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Does this work for Dell Latitude E7240? Would it charge the battery? Which tip do I need to get? Would it work with American Airlines DC outlet?
Document: This adapter seemed to work fine at first as it powers everything, but it doesn't actually charge the battery on my Dell Latitude E6400. The battery stays at the same "% charged" level, even with only the laptop plugged in.Also, Targus does not make a tip for the Asus eeePC netbooks.
Sometimes, if working in a library or a coffee shop, the outlet is not right next to where you are sitting. This means you will not be able to charge your laptop if you are sitting too far. The cord is probably around 5.5 feet which is pretty short compared to the cords you get with your laptop.-- Won't charge some Dell's: The tip that is supposed to charge the Dell Inspiron 1500 doesn't really charge. It gives it power but is unable to charge the laptop battery.
I just received it and tried it on my Dell XPS laptop with an extended battery (90Wh capacity). It charged the battery from 7% to 100% in about 140 minutes, while I continued to work on the laptop using a "High Performance" power plan. It was also able to charge an I-Phone simultaneously. The computer did not display any adapter mismatch warnings.And yes, it does get hot.You get 10 additional tips for free + S/H of $5.
The Targus Premium Laptop Charger (AC/DC) APM69US is certainly one of the most versatile devices of its type. The package includes the main power converter, and auto DC adapter, and enough tips to cover virtually any charging need you could have. Well almost.The Charger arrived with 11 tips. I was somewhat disappointed in that I could not use the charger with my new Macbook Pro, nor did I receive a tip that would allow me to charge my Blackberry Storm.
I got another complete kit. The second DC power tip broke (cheap plastic tip breaks off easily apparently) but I was able to to just stick it back on. A week later, when I plugged it into an airline outlet, it overheated; power surged and bricked my machine. Not good.3. I can't recommend this product for a traveler. Either shell out the $100 for one of the better ones on Amazon or just get one from your device manufacturer.
I had high hopes for the Targus Premium Laptop Charger, especially given its price (about double what Dell wanted for an OEM 90 watt laptop charger). Despite verifying on the Targus website that the charger was compatible with my Dell Studio 1558 laptop (and that the appropriate charge tip was included), it was unfortunately unable to charge my laptop battery. It did run the laptop while plugged in.
I needed something better.The Targus Premium Laptop Charger works great. When I plug it into my laptop, I get a warning that I should connect it to a higher current adapter for best performance. I have seen this on lower wattage HP chargers also - and on the HP travel adapter. I was expecting the Targus charger to run my laptop without charging it; however, I was pleasantly surprised to find that I could work on my laptop and my battery will charge.
I just received this today, but I am already happy with it so far. I have had many replacement chargers and a/c adapters, but most WON'T charge my Dell 1525. Tried this in the car tonight and it charges the Dell just fine. I registered it online following the instructions in the manual to get free tips (for just shipping and handling), but it didn't give me the special coupon code to enter at check-out to get the tip for my phone at no charge.
It's tough to get excited about a laptop charger. And it's tough to understand why you would want to replace the one you already have. What this charger does is allow you to charge any two devices at the same time, and any one of multiple devices from the same charger. For those who travel with a lot of electronic devices, which is obviously going to be very convenient, since you can bring one charger (plus the tips you need) on your trip.
I am pretty sure it would charge even faster if my laptop was off.When using this in a car, the Targus design replaces the A/C brick for the auto adapter. The auto adapter runs cool and works well.Another nice feature is the dual charging options. This really paid off today. I am at the hospital waiting and using my computer to get work done. I am using the internet connection through my HTC Evo (Android) phone.
Answer: This should work fine with the Dell. It comes with 9 different tips, plus mini-USB and iPhone 30 pin, including ones that will fit almost anything but Mac Magsafe. If it doesn't have the right tip I've heard, but can't guarantee, Targus will send you one if they build one. The wall unit is rated at 90 Watts, well beyond the 65 Watt stock Latitude E7240, so you can charge your lappy and a phone at the same time. If American Airlines is using standard auto-style power plugs the included DC plug should work fine. If it's the smaller "emPower" jack you will need an adapter, usually about $10, from emPower to Auto DC. I haven't been on an American flight for a while so can't say for sure what they use.