The device was returned to zoll medical corporation for evaluation.The customer's report was observed during review of the device data logs.However, the device was put through extensive testing including power tests with ac / battery, bench handling, and environmental chamber testing without duplicating the report.An internal inspection found no discrepancies.The ac charger was replaced as a precaution.The device was recertified and returned to the customer.Analysis of reports of this type has not identified an increase in trend.
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