L20C4P71 / L20M4P71 is listed for Lenovo ThinkPad X1 Carbon Gen 8. We will reconfirm the old battery part number, voltage, connector, and shape before processing.

3,605 mAh4 cells15.36V

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Battery is swollenOnly works while plugged inShuts down soon after unpluggingNot charging or percentage is stuckVery low backup after a full chargeBattery is not detectedOther problem

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