Communication with the customer did not identify the cause for the depleted battery pack.The customer installed a backup battery pack and the aed functioned as designed.The maintenance schedule for the aed is not known.The customer was advised order a replacement battery pack from distributor, keep pads connected, verify the asi flashing green.The aed can be returned to service after these items are completed.As the battery pack is out of warranty it will not be returned for analysis; the cause of the complaint cannot be determined.The ifu states: "improper maintenance can cause the ddu-100 series aed not to function.Maintain the ddu-100 series aed only as described in the user manual and operating guide.The aed contains no user-serviceable parts- do not take the unit apart." "follow all battery pack labeling instructions.Do not install battery packs after the expiration date." "follow all defibrillation pad label instructions.Use defibrillation pads prior to their expiration date." the available information does not indicate that the device did not perform as intended or failed to meet product specifications.This device is used for treatment, not diagnosis.Should additional information become available a follow-up mdr shall be submitted.
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