Communication with the customer did not identify the cause for the depleted battery pack.The maintenance schedule is not known.The customer was advised to get a new battery pack and a 9v lithium battery.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-120 series aed not to function.Maintain the ddu-120 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." should additional information become available a follow-up mdr shall be submitted.
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