Maybe you haven't unplugged the thing for a long time that some of the components inside the circuit is already blown... might be a capacitor. I guess you're like the others who doesn't know how to use the charger the right way.
You always have to unplug it from the outlet, EVERY NIGHT or every time you shut down the computer. Never leave your computer on all the time or just put it to sleep/hibernate when your not using it. You should always SHUT IT DOWN THE PROPER WAY after every time you use it & you have to leave your room.

I used to work for a big name computer company & usually received a lot of call regarding battery issues.
A brand new computer's battery comes w/ a Standard 1yr Limited Warranty w/c means the expected life time of battery is only 1 year. Same thing goes for the charger.
So, if you don't know how to take care of it, it will die out on you sooner than than expected.

FYI: I always tell my customers, a laptop's battery is similar to a cell phone's. You charge it when it's depleted & you unplug the adapter when it is already fully charge (this will prevent the battery from getting overcharged & extend the life of the battery). So for less hassle, I always advice my customers to just remove the battery if they plan to use the computer for long hours straight (more than 1 hour) and just run it on AC power alone so as not to overcharge it & shorten the battery life.
ONLY USE THE BATTERY FOR PORTABILITY, if you're on a trip, at McDonalds or Starbucks.
If your not after its portability, you can use it just plugged into the wall socket all the time.

For chargers, make sure you don't stretch out the cable too much that the one by the power jack that you plug into the side of the computer gets bent. Make sure this part is always straight or else the copper wires inside will break & soon you'll have the problem of the charger not working anymore like what happened to some of my callers.

Luckily, if your computer is still in warranty, Dell will replace it with a brand new one for free (within 1 year of purchase). If it is still in warranty, call DELL Experts hotline number (1-800-305-6561) for further assistance from the Phone Tech Support Team. Make sure to write down the name of the person who will get your call. Tell them the charger stopped working & you want it replaced.

FYI, which ever country your call will be routed to, please be patient & polite to the person who will take your call. After all, you are the one calling them for assistance with whatever issue you are having with your portable computer. Make sure to speak your name clearly (spell it, if need be) & provide all the info needed & asked for. They are trained professionals for handling simple matters, so I believe they should be able to assist you w/ any issue as long as IT IS WITHIN THEIR SCOPE OF SUPPORT. It depends on the company but be cooperative because these phone technicians have a specific handle time to be able to resolve the issue of a caller, so please do not be a jerk. Listen carefully to their instructions & follow it, because IF YOU THINK YOU KNOW MORE, then WHY CALL FOR ASSISTANCE IN THE FIRST PLACE.

If your computer's 1-yr Standard Limited Warranty has ALREADY EXPIRED, then ask them politely & talk to them in a friendly manner, for they are there to listen and PROVIDE YOU BASIC INFORMATION as much as they can. Ask them for the model number of the charger,
then see if they sell it here: http://www.newegg.com/Store/SubCategory.…
Best time to call, after midnight Pacific Time.

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