RE: XPS 13 amber battery light always on
According to that article, a repeatedly flashing amber light means the battery has failed.
"Fatal battery failure with AC adapter present. Constantly blinking amber light."
A solid amber light, again according to that article, means that there is less than 10% charge, which is not the case.
As my post stated, I have a solid amber light at all times, regardless of the level of charge in the battery.