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[Solved] LENOVO 01AV489 -045A20 LGC, after reading EEPROM or Clearing Errors, battery is not readable

Fogonazo
(@ventas)
Prominent Member Customer

after reading EEPROM or after clearing errors Can not read anymore the battery. If I wait some minutes and reconnect it reads again, battery is unsealed but can not clear erorrs. Snapshots are from similar batteries, I have some identical, it happens with all of them.

Battery is readable at 0x36 Address

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Topic starter Posted : 24/04/2024 7:50 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 This chip uses double addressing depending on its state. For SBS reporting 0x36 is used, for other things it uses basic 0x16 address. 

 Currently software does not support address toggle. So try the tips from this topic to read or write eeprom. 

https://www.laptopu.ro/community/postid/27208/  

 

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Posted : 24/04/2024 8:24 pm
Fogonazo liked
Fogonazo
(@ventas)
Prominent Member Customer

@djibattworkshop Thanks, I was able to read and write dump. The procedure is first unseal in 0x36, press clear errors, it gives ERR code 34, after that I change address to default, then I am able to read and write dump. I am trying to identify PF now, I am not sure where to find them.

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Topic starter Posted : 25/04/2024 1:01 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Try to clear errors same way. So after error was occured, change address and press Clear Chip Errors button repeatedly. 

 

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Posted : 25/04/2024 1:04 pm
Fogonazo liked
Fogonazo
(@ventas)
Prominent Member Customer

@djibattworkshop it worked! Thanks!

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I am comparing both dumps, locked and unlocked, they begin at different offset

 

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Topic starter Posted : 25/04/2024 1:46 pm
Fogonazo
(@ventas)
Prominent Member Customer

Issue is solved, I am just reading and comparing dumps to understand how all this works.

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Topic starter Posted : 25/04/2024 1:56 pm
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