I had the swollen battery issue suddenly happen to my Dell XPS 9550 with the corner of the laptop cracked apart and the touch pad raised up a quarter inch. At first I thought I had dropped it or something -- but I was sure I hadn't.
It wasn't until, weeks later, I had a chance to open up the laptop to have a look. When I realized that the battery was swollen I Googled "swollen battery 9550" and realized it was a recognized issue with this machine.
So I contacted Dell, expecting them to replace the battery. No problem, right? They were replacing batteries even for out-of-warranty 9550s.
Wrong. They're refusing because the offer to replace the batteries has already expired.
Those of us that didn't realize we had potentially defective and potentially dangerous batteries in our 9550s are out of luck.
I'm really annoyed at Dell over this. Can you imagine if any other defective/dangerous product was acknowledged by the manufacturer but they put a deadline on dealing with it?
I was about to buy a new Dell XP this week but not after this poor experience.