I am trying to fix a friend's laptop, which will rapidly discharge if not plugged in. When plugged in, it will remain at 2% battery life, and will not charge or discharge. This is incredibly inconvenient, and I am not sure, after having looked around for a fair time, I am not sure what to do. If the adapter is unplugged and re-inserted, the following message appears:
"The AC power adapter type cannot be determined. Your System will operate slower and the battery will not charge. Please connect a Dell 65W AC adapter or higher for best system operation."
The adapter is in fact a 65W adapter, it is the adapter that came with the computer, which was purchased this summer. It is a Dell Inspiron 15, running Windows Vista.
I apologize, as this is not an ubuntu-related problem, but I am unsure where to ask otherwise. Other sites answering similar problems have said it may be that the battery is dead, and that it may need to be replaced. However, I am doubtful of this, as the laptop was purchased this summer.
Any help would be appreciated. Thanks.