The complaint is being reported by zimmer biomet as (b)(4).This follow-up report is being filed to relay additional information, which was unknown at the time of the initial medwatch.Review of the device history record identified no relevant deviations or anomalies.Product examination found that the battery pack had ruptured.The sealed packaging had not been opened.This complaint is confirmed.The reported event claimed that the sealed unit had ruptured before it had been opened.While rare, this kind of event occurs when the batteries overheat from a short circuit.To address this issue, a change has been implemented to adjust the length of the wires inside the battery pack.This means that there will no longer be a need to tightly fold wires inside the battery pack in order for them to reach their respective circuit contacts.This reduces the risk of a short circuit.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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