Symptoms

  • Laptop system indicates charging system battery when the AC adapter is not connected.
  • The symptom persists even after Windows shutdown or restart.
  • Power LED is on and indicates charging condition (e.g. Lit Orange).
  • System battery continues to drain or cannot charge when connected to AC adapter.


Applicable Brands

Lenovo ThinkPad X1 Carbon and X1 Yoga


Solution

Both steps are required to permanently resolve this condition:

  1. Briefly press the Battery Reset button (bottom side - pin hole, using paper clip).
    This pin hole reset will disconnect the internal system battery and clear the charging LED.

  2. Use the Thunderbolt firmware update utility to install the firmware update for the specific system.

Links to Software


Thunderbolt Firmware Update Utility for Windows 10 (Version 1703 or later) 

ThinkPad X1 Yoga (Type 20LD, 20LE, 20LF, 20LG) - LINK==>  YOGA Thunderbolt Firmware Update Link


Firmware Update Utility for Windows 10 (64-bit)

ThinkPad X1 Carbon (Machine types: 20KH, 20KG)  - LINK==> CARBON Firmware update for Windows







Lenovo Support Ref:

https://support.lenovo.com/us/en/solutions/ht508400-battery-icon-shows-charging-when-ac-adapter-is-disconnected-x1-carbon-6th-gen-x1-yoga-3rd-gen