I can confirm the smell. I bought he phone some weeks ago and unsealed the box on my own.
When opening the box I got shocked by the pretty strong smell that was everywhere (phone/charger/box).
It has dissipated after a few days and I guess it's some adhesive solvent ... hopefully.
I'm saying hopefully, because I recall the exact smell from a Li-Ion laptop battery that was bulged and I had to puncture before removing. So, I hope it's not the battery that leaked electrolyte during the assembly ...