Hello,
I have also the same problem. I used the online dell diagnostic tool. It reports problem with battery need to change.
My Laptop is 2 years old but I didn't used battery I remove it after buy lap top. But last month i start use my laptop with battery and it work without AC only on battery above 2 hours. And now it doesn't work.
How it can be possible it working 2 hours without problem all month but now it doesn't working.
Can you help me?
Kind regards