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Lenovo L13M4P71 A2168 Clone FCC bug

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sajantherev

(@sajantherev)

Honorable Member Customer

seems like chip manipulate to be BQ40Z695, visual check this batt use a2168 controler.

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Topic starter Posted : 03/12/2024 8:28 am

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

Do you observe small green submodule on the pcb ?..

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Posted : 03/12/2024 9:16 am

sajantherev

(@sajantherev)

Honorable Member Customer

Do u mean U1? First time see this

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Topic starter Posted : 03/12/2024 12:45 pm

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

Try to change FCC using bq20zXXX plugin.

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Posted : 03/12/2024 2:58 pm

sajantherev

(@sajantherev)

Honorable Member Customer

fcc change but make battery lock

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Topic starter Posted : 04/12/2024 3:40 am

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

Press ClearChipErrors button.

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Posted : 04/12/2024 8:16 am

sajantherev

(@sajantherev)

Honorable Member Customer

@djibattworkshop still same

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Topic starter Posted : 04/12/2024 1:47 pm

sajantherev

(@sajantherev)

Honorable Member Customer

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Topic starter Posted : 05/12/2024 6:25 am

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

Try to read eeprom

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Posted : 05/12/2024 6:33 pm

sajantherev

(@sajantherev)

Honorable Member Customer

@djibattworkshop

failed, can't read eeprom

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Topic starter Posted : 06/12/2024 6:33 am

sajantherev

(@sajantherev)

Honorable Member Customer

any solution ?

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Topic starter Posted : 10/12/2024 7:45 am

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

It looks this chip has custom firmware. So it is not supported by the software. The solution is to install genuine Lenovo pcb with bq40z695a chip. You could try any 2S Lenovo PCB if you dont have L13M4P71 board.

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Posted : 10/12/2024 12:58 pm

sajantherev

(@sajantherev)

Honorable Member Customer

@djibattworkshop found the original bms with the same device code, I need a firmware adjustment

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Topic starter Posted : 11/12/2024 11:50 am

sajantherev

(@sajantherev)

Honorable Member Customer

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Topic starter Posted : 12/12/2024 7:31 am

DjiBattWorkshop

(@djibattworkshop)

Member Moderator

Looks good. Check battery in laptop.

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Posted : 12/12/2024 9:17 am

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