The unit was returned and an evaluation completed.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 printed circuit board.There was a blackening on the top of the lower battery pack and its printed circuit board.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.Recall z-2716/2717-2016 was closed on july 26, 2017.
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It was reported that the battery was placed on the unit and set down.When it was picked back up, there was a burning smell coming from the unit.There was no report of injury, patient or user involvement, or impact to patient care.
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