Upon receipt at our post market quality assurance laboratory, a review of device memory revealed that the device declared elective replacement indicator (eri) after experiencing two consecutive charge times greater than the extended mid-life eri charge time limit.The observed rate of battery usage was compared to the expected rate of battery usage; the results indicated that the monitoring voltage was normal.Although the battery itself had not depleted prematurely, eri was triggered earlier than expected by extended charge times due to a higher-than-typical buildup of internal battery impedance.
|