This event has been recorded by zimmer biomet under (b)(4).Investigation summary: review of the device history record could not be performed as there was no lot number reported for this complaint.Product examination found that the battery pack had ruptured due to a short circuit.However, the returned product included only the battery pack, which had been separated from the hand unit by cutting the wire.Cutting the wire can directly result in the kind of damage both exhibited in the product examination and reported by the customer.The timing of this rupture cannot be determined and this reported event cannot be confirmed.The root cause of the reported event could not be specifically determined with the provided information.The investigation was based on the information that was provided initially and any information that was obtained throughout the follow-up process.
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