Upon visual inspection, it appears that a thermal event occurred.It is not possible to determine the exact sequence of events that led to the thermal event.However, there is evidence that a short occured in the lower battery pack between the cells and pcb.There was a blackening on the top of the lower battery pack and its printed circuit board (pcb).Cells 2 and 3 appear to have been involved in the thermal event, likely by supplying energy into a fault in the board.Additionally, there was a slight melting of the handset plastic enclosure.This concludes the investigation.A recall is ongoing.Reference z-2716/2717-2016.
|