Hi Jimgazz,
When you plug in the laptop's power connector, the connection should be fairly solid. If it's suddenly wobbly or loose, or if the receiving socket gives when it should stay firm, the power jack may have broken inside the chassis. Are there discolorations or any sort of burning smell? If there seems to be any damage to the power connector, repairs will be in order.
A non-charging battery can sometimes be caused by an overheating laptop.
Other than take it to a repair facility to have them look at the adapter connector to the laptop.
With all the information you have given me and tried on the laptop. I do believe it is the laptop connector. Not the battery or the ac adapter.
Thanks.