The company I work for used to buy XPS's for upper management and C-levels. We stopped because every single one of them had their batteries bulge so bad they popped out the keyboards and trackpads. At first we thought it was a problem of traveling with them in standby, but then it started happening on users' desks. Other Dell laptops don't have such a problem, it has to be something with the XPS design.
Any lithium-ion battery can go spicy. The pouch form-factor common to the thin profile laptops that don’t have easily removed batteries can really swell.
