The autopulse battery in complaint was returned to zoll on 07/29/2014 for investigation.Investigation results as follows: the battery was placed in the battery tester and the results indicated that the battery was below the minimum power output watts of 1300w with a reading of 779.4w.The battery was then fully charged and test cycled, then re-tested with the battery tester, where the results indicated that the battery was below the minimum power output watts of 1300w with a reading of 809.5w.An investigation conducted using the battery's serial number (sn) found that the battery was at the end of its expected life span of 2-4 years with a manufacture date of september 2010.It was also found that the proper amount of test cycles (47 +/- 1 expected, 5 performed) were not performed.The expected service life of the autopulse battery is 100 charge cycles or 2 to 4 years depending on battery maintenance (charged/test cycled as instructed per the ifu) and usage patterns.
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