The reported complaint was confirmed during functional testing of the returned autopulse lithium ion battery.The battery failed charging in a known good multi chemistry charger.No physical damage was observed, and four green lights were lit on incoming inspection.From the battery archive review, battery was last charged successfully on (b)(6) 2018 and was last used/inserted in the autopulse (b)(6) 2018.From (b)(6) 2018 to the end of the archive on (b)(6) 2018, battery recorded multiple repeated cell over-voltage during each customer's charged attempts.Possible cause for the over-voltage can include damaged bleed-resistor, open cell-tab, or voltage-sense resistor on the battery management board.The battery continued to show four green leds on the battery status because it was charged when the problem occurred.
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During a shift check, the autopulse lithium ion battery failed to charge in the multi chemistry charger and display red x led.Additionally, the battery status indicator displayed as fully charged.The user tested the battery by placing it in autopulse platform, and the platform displayed a "replace battery" message.No patient involvement was reported.
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