Notifications
Clear all

Lenovo LNV-42T4977 BQ20895 FW V0.11, unable to read eeprom

Page 1 / 2
FJ
 FJ
(@brs)
Prominent Member Customer
image
image
ReplyQuote
Topic starter Posted : 21/11/2023 4:03 pm
FJ
 FJ
(@brs)
Prominent Member Customer

chip is unsealed but unable to read eeprom. how to read/save?

ReplyQuote
Topic starter Posted : 21/11/2023 4:04 pm
FJ
 FJ
(@brs)
Prominent Member Customer
image
image

probably chip is not unsealed

ReplyQuote
Topic starter Posted : 21/11/2023 4:08 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 This chip was added to supported list by mistake. It is actually not supported. 

 

ReplyQuote
Posted : 21/11/2023 5:08 pm
torture
(@torture)
Member Moderator
Posted by: @brs

probably chip is not unsealed

Correct.

SS bit is still active.

13250 image
ReplyQuote
Posted : 21/11/2023 5:12 pm
FJ liked
FJ
 FJ
(@brs)
Prominent Member Customer

is it possible to unseal/reprogram remotely?

ReplyQuote
Topic starter Posted : 22/11/2023 4:45 am
FJ
 FJ
(@brs)
Prominent Member Customer

just need to adjust the CC.

ReplyQuote
Topic starter Posted : 22/11/2023 4:45 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 You could try unseal over Remote Server. 

 

ReplyQuote
Posted : 22/11/2023 11:56 am
FJ
 FJ
(@brs)
Prominent Member Customer
image

after 1 full charge, v.big imbalance appeared

ReplyQuote
Topic starter Posted : 22/11/2023 2:32 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Measure each cell with multimeter. 

 

ReplyQuote
Posted : 22/11/2023 2:34 pm
FJ
 FJ
(@brs)
Prominent Member Customer
image

is it because of cells resistance difference?

ReplyQuote
Topic starter Posted : 22/11/2023 2:53 pm
FJ
 FJ
(@brs)
Prominent Member Customer
Posted by: @djibattworkshop

Measure each cell with multimeter.

actual voltages are same

ReplyQuote
Topic starter Posted : 22/11/2023 3:03 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Try the following. Balance the cells, charge the battery to full. Balance the cells. Then run one full discharge / charge cycle. If imbalance will be over 50mV cells should be considered to replace. 

 

ReplyQuote
Posted : 22/11/2023 3:24 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

actual voltages are same

 Do you mean all cells voltages are equal and the same or cells voltages measured are the same like on BatInfo tab picture ?.. 

 

ReplyQuote
Posted : 22/11/2023 3:27 pm
FJ
 FJ
(@brs)
Prominent Member Customer
Posted by: @djibattworkshop

 Do you mean all cells voltages are equal and the same or cells voltages measured are the same like on BatInfo tab picture ?.

mean voltages are as on Batinfo tab. they match exactly

ReplyQuote
Topic starter Posted : 22/11/2023 3:46 pm
Page 1 / 2
Share: