I've got an XPS 9530 from 2015 and I'm worried that its battery might be swollen. The front of the case to the right of the trackpad is raised and pops back up if I squash it together. The screw underneath that area is missing, but I'm not sure if the case pops up because of the missing screw, or if the screw is missing because of a swollen battery. It is difficult to right click, which I've read is another warning sign of battery problems.

To complicate matters I usually live in the UK but I am currently in Toronto, due to fly back to the UK on Friday afternoon.