Previous topics discussed the possibility, here's how to open up the battery in order to view / examaine / replace faulty swollen LiPo cells:
http://ninoransenberg.com/2014/10/30/dji-phantom-vision-2-battery-disassembly-how-to-video/
http://ninoransenberg.com/2014/10/30/dji-phantom-vision-2-battery-disassembly-how-to-video/