I had the exact same issue (base of the laptop bowing because the battery is swollen, the trackpad was almost coming out) : it's actually pretty straightforward

I had the exact same issue (base of the laptop bowing because the battery is swollen, the trackpad was almost coming out) : it's actually pretty straightforward to replace the battery yourself. Unscrew something like 8 standard screw, replace the battery, rescrew. If you don't have any tools at home and are not sure what battery to buy : https://eustore.ifixit.com/products/dell-xps-15-9550-and-5510-precision-84-wh-replacement-battery https://eustore.ifixit.com/products/dell-xps-15-9550-and-551...