reconditioning cf-c1 batteries with new 18650 cells ? how doable is it ?

Discussion in 'Panasonic' started by pierro78, May 1, 2020.

  1. pierro78

    pierro78 Notebook Geek

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    EDIT :
    I am going to use this thread as a general discussion thread for the CF-C1 now (the battery question has been answered but I want to see if it might be better to keep the discussion general so that CF-C1 users keeps a discussion open for a longer time)

    Wiki Page for the CF-C1 : https://panasonic.fandom.com/wiki/CF-C1

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    Original message :


    Hello, saw a guy on (see comments under user cliz305) saying he reconditioned cf-c1 batteries with cheap 18650 cells ... I tried to open my 60% used battery but wasn't able to find a "not too brutal" way of doing so ...
    ... any opinion/help on this ?? :)
    Thanks !!

    PS :
    I also see, for example in this thread http://forum.notebookreview.com/threads/cf19-battery-refurbishing.700827/ , that there's probably some kind of charge counter in my battery that would make putting new cells in it useless ...
     
    Last edited: Jan 7, 2021
  2. Springfield

    Springfield Notebook Deity

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    Your concerns are valid. Only way I know to open batteries is hammer a sturdy knife along the case seam. And every Panasonic battery I know of since about 2000 has an internal controller that no one has yet claimed to reset. But if you know a bit about batteries and don't mind risking yours, go for it!

    PS: Panasonic makes the *best* 18650 cells - I have 20 year old Toughbook batteries that still take a charge.
     
  3. kschewe

    kschewe Notebook Geek

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    Not worth trying to rebuild the battery. I have rebuilt for lenovo and hp but its sort of risky for fire and liability issues.
    @Springfield I I totally agree with the panasonic batteries. I bought this year 4 older cf-t8 for friends kids. ebay surplus. I was expecting dead batteries. All of them held charges for hours. Even one of them was a t5. 10 year+ old batteries. I have a pile of toshiba, dell hp from fixing. Dell is the worse and most of these were probably 2+ years old
     
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  4. pierro78

    pierro78 Notebook Geek

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    thanks for the info !

    ... I guess I've been a little bit unlucky that one of my c1 battery only has 40% of life left (the other has 70%) ... I saw some c1 batteries on ebay for less than $50 ... I guess I am going to buy one of these and forget about rebuilding my battery ... I wonder how well this rebuilding went for the guy on youtube though ...
     
  5. pierro78

    pierro78 Notebook Geek

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    by the way how were the screens on your t8s ??
    ... I find my screen a little bit yellowish on my c1 ...
    thanks again !
     
  6. kschewe

    kschewe Notebook Geek

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    All of the t8 had around 20000 hours. They are not bright and would be no good outside. The t5 was really nice and bright but had low hours. Older tech ccfl backlight. You can swap most of those models. I used screen from t5 that was very bright on others if you dont mind losing the touch screen. I did change the tube a couple times on hp or toshiba. These little machines would be a pain to take the screen out and maybe not practical to take the lcd apart. They show up on surplus or scrap for cheap though.
    My newer cf-c2 screen is very bright that i keep it almost on the lowest setting.
     
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  7. pierro78

    pierro78 Notebook Geek

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    yeah my C1 screen is not very bright either but it's OK with me ... I really need to put it at the right angle though as the vertical viewing angle is kind of small, especially under light ...
     
  8. toughasnails

    toughasnails Toughbook Moderator Moderator

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    This is from a post I did some time ago. It was just sitting on my table when this happened. I rebuild it weeks before this happened...

     
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  9. pierro78

    pierro78 Notebook Geek

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    I received a CF-C1 mk1 with no yellow screen issue (because it has only 1500 hours ! my cf-c1 mk2 has 62500 hours which translates to about 7 years and 2 months !!!!! no surprise if its screen is kind of yellowish ! )

    I am wondering how doable would that be to replace the mk2 screen with the mk1 screen ???
     
  10. pierro78

    pierro78 Notebook Geek

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    PS : I am adding that my cf-c1 mk2 has 62500 hours (which translates to about 7 years and 2 months !) ... I received a cf-c1 mk1 with only 1500 hours and its batteries are much better with 10% and 15% of wear (90% and 85% of life left)
     
    Last edited: May 14, 2020
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