The reported event of "the autopulse li-ion battery (sn (b)(4)) does not hold charge" was confirmed during the archive data review but not during the functional testing.There were no device deficiencies found during the evaluation of the returned battery that could have caused or contributed to the reported complaint.The autopulse li-ion battery performed as intended.The root cause for the reported complaint was due to battery mismanagement and charging practice by the customer.Upon visual inspection, no physical damage was observed, and no leds of any type were lit on incoming inspection.The battery passed charging in a known good autopulse multi-chemistry charger (mcc).The battery remaining capacity was equivalent to four green lights on the battery status bar after charging attempt.The battery archive data review showed battery mismanagement and charging practice by the customer.The customer let the battery remain in the autopulse platform for an extended period of time and was discharged below its minimum operating voltage.The autopulse power system user guide states: "after every use, at the beginning of a shift, or at least once every 24 hours, the battery in the autopulse should be replaced with a fully charged battery."a fully charged li-ion battery left in a zoll autopulse platform for an extended period of time will eventually discharge below its minimum operating voltage.A fully discharged battery will not display any led status lights and will fail charging.We noticed that battery was not maintained per user guide.Educated the customer by sending a letter with investigation findings and by providing a copy of the autopulse power system user guide.
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