The battery overheating?
Chexk the back of the battery, below the upc for any of these numbers. If it is one of these models, contact Dell and get it warranteed.
The number below the barcode, it should be in the second series of numbers.
I believe it's something like this... xx-xXXXXXXx-xxxx-xxx
or something similar. The nimbers your looking for would be where the x in my example is capitalized.