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#21
To determine whether this is a problem with your AC adaptor or your battery, I recommend you should buy the same version of your adaptor online, then plug the new one in to see if the problem still persists. You need to look for an adaptor with the model number:
LA65NS2-00.
Search for this using your country's version of Google.
If this problem still persists, try the same thing for the battery. Here is a list of batteries to choose from: dell battery GW240 - Google Product Search