@mandog: It is a 2.5" notebook drive. I own one. Mine is USB-3, there is no external power connector for it. I agree, if it wasn't under warranty, & it was mine, I too would end up removing it from its case & attaching it directly to my computer.
Also, if the data was really valuable to me, I would say damn the warranty & rip the drive out of the case & try everything I could, to get a clone of the partition(s), before then going to work on the actual drive. Using whatever tools I found (after lots of research) to be the current pick of the crop for the job(s) at hand.
It all comes down to being able to access the partition(s) on the drive. Because it is so portable, if I could, I'd be plugging it into other computers in the hope that I'd get lucky. Cause sometimes you can.