Sentence:  Aesthetics (ID, industrial design) are another obvious reason to go that route, with designers opting for a fluid, <WSD>unibody</WSD> motif, since sealed phone body is a beautifully crafted device "... created from a single piece of polycarbonate with precision machined details." This ID design philosophy is in a direct conflict with customers' desire of extended use of their purchased phones; that is, when the sealed battery fails to function because of the limited charging cycles, and a replacement is needed. 
Meaning of the word marked with <WSD> tags:  A style of mobile phone, tablet, or laptop computer where the user cannot replace the battery because the device is manufactured as a single sealed unit.