This companion external battery was not in use by a patient.A syncardia clinical support specialist reported that this companion external battery was unable to charge and was not recognized by a companion 2 driver.This alleged failure mode poses a low risk to a patient because the issue was observed when the companion external battery was not in patient use.In addition, this alleged failure mode would not prevent a companion 2 driver from performing its life-sustaining functions.The companion 2 driver has multiple power sources: external wall power, external batteries and an internal emergency battery.The results of the investigation will be provided in a supplemental mdr.
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