Zoll medical canada evaluated the device and the customer's report was not replicated or confirmed.The device was put through extensive debug and final testing without duplicating the report.The battery assembly was replaced as a precaution.The device was recertified and returned to the customer.Review of the device log observed the device was charging slowly at the time of the reported event due to a low battery.However, the battery used in the event was not returned for evaluation.No trend is associated with reports of this type.The x series operator's guide, page 24-7, guidelines for maintaining peak battery performance states: always carry at least one fully charged spare battery.If no other source of back-up power is available, two spare batteries are advisable.The manual also recommends reconditioning at least once per year for the first three years, then every quarter for batteries in the field greater than three years.
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