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Module Power: Designed for e-call or telematics unit service, the rechargeable lithium pack helps replace an aging internal backup battery when warning messages appear Part Number Check: Built around identifier 3G0 915 089, this backup battery helps you compare the factory label before ordering for a more accurate replacement review Harness Connection Layout: The attached multi-pin plug and wire assembly reflects the factory connection format, helping technicians compare routing and install without cutting wires Single Pack Reminder: Includes a backup battery with connector harness; compare the part number on the removed unit and use experienced vehicle electrical installation practices Verified Electrical Basics: Product information lists 7.3V nominal voltage, 1460mAh nominal capacity, and an 8.4V charging limit to informed replacement planning