Upon visual inspection is 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 occurred in the lower battery pack between the cells and printed circuit board (pcb) there was a blackening on the top of the lower battery pack and 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 our investigation.Upon initial receipt of the complaint aribex did not believe the event was a reportable event.However on 2/6/2017 during the initial investigation it was determined this event should be reportable.A recall is ongoing.Reference (b)(4).
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